Challenges

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For Expeditions Arena Challenges, see Expedition Challenges.

Challenges is a special game mode that rewards Challenge Points, which when reaching certain numbers reward Challenge Milestones and extra damage. It is unlocked at level 15. Every challenge has a set of Creatures with increasing levels. When the final creature of the challenge is defeated, the player is rewarded with challenge points, and other miscellaneous currencies. Rewards are given only one time per difficulty tier. There are two types of Challenges: Normal Challenges and Series Challenges.

Normal Challenges

In Normal Challenges, every Creature is labelled as a Boss, and the HP will be calculated as one. Completing a challenge for the first time rewards Challenge Points, Gold, AP, and Diamonds.

Note: Challenge Points, AP, and Diamond rewards remain constant regardless of mode or difficulty, but the Gold rewards only remain constant regardless of mode.

Currently there are 9 Normal Challenges. Completing every challenge on every mode on every difficulty yields:

• 422.24M
• 3,385
• 5,950
• 11,385

Name	Number of Creatures	Stage	Challenge Points	AP	Diamonds
Rats!	5	Cellar	6	10	20
Fruitarian No More	5	Hill Side	6	10	20
Tribal Smash	5	Wood Gate	6	10	20
Uhg A Thug!	13	Desert	15	30	58
WereThings	12	Forest	16	30	55
Under the Sea	5	Under Water	6	10	20
Rednex	5	Farm	6	10	20
Galactic Snackbar	5	Restaurant	6	10	25
Infested	5	Cave	6	10	20

Gold Rewards

• Gold reward for a specific challenge and difficulty tier is given by$BGR \cdot D^2$, where BGR = base gold reward for the challenge at Bronze I and D = difficulty rating.

• Difficulty ratings range from 1 (Bronze I) to 5 (Bronze V), 6 (Silver I) to 10 (Silver V), and 11 (Gold I) to 15 (Gold V) for the purposes of the above formula.

• Certain gold rewards are affected by a negligible rounding error. These are shown in brackets.

• Bronze
• Silver
• Gold

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	13,000	25,000	20,000	75,000	200,000	16,000	15,000	13,000	13,000
II	52,000	100,000	80,000	300,000	800,000	64,000	60,000	52,000	52,000
III	117,000	225,000	180,000	675,000	1.8M (1.799M)	144,000	135,000	117,000	117,000
IV	208,000	400,000	320,000	1.2M	3.2M (3.199M)	256,000	240,000	208,000	208,000
V	325,000	625,000	500,000	1.875M	5M (4.999M?)	400,000	375,000	325,000	325,000

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	468,000	900,000	720,000	9.075M	2.7M (2.699M)	576,000	540,000	468,000	468,000
II	637,000	1.225M (1.224M)	980,000	3.675M	9.8M (9.799M)	784,000	735,000	637,000	637,000
III	832,000	1.6M (1.599M)	1.28M	4.8M (4.799M)	12.8M (12.799M)	1.024M	960,000	832,000
IV	1.053M	2.025M	1.62M	6.075M	16.2M (16.199M)	1.296M	1.215M	1.053M	1.053M
V	1,3M (1.299M)	2.5M (2.499M)	2M (1.999M?)	7.5M (7.499M)	20M (19.999M?)	1.6M (1.599M)	1.5M (1.499M)	1.3M (1.299M)	1.3M (1.299M)

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	1.573M	3.025M	2.42M	7.2M (7.199M)	24.2M (24.199M)	1.936M	1.815M	1.573M	1.573M
II	1.872M	3.6M (3.599M)	2.88M	10.8M (10.799M)	28.8M (28.799M)	2.304M	2.16M	1.872M	1.872M
III	2.197M	4.225M	3.38M	12.675M	33.8M (33.799M)	2.704M	2.535M	2.197M	2.197M
IV	2.548M	4.9M (4.899M)	3.92M	14.7M (14.699M)	39.2M (39.199M)	3.136M	2.94M	2.548M	2.548M
V	2.925M	5.625M	4.5M (4.499M)	16.875M	45M (44.999M?)	3.6M (3.599M)	3.375M	2.925M	2.925M

Difficulties and Modes

There are 3 Challenge difficulties: Bronze, Silver, Gold, each containing 5 difficulty tiers (I, II, III, IV, and V) within themselves. Each Tier and Difficulty will be blocked for each challenge until the player finishes the previous Tier.

Also, there are 3 Challenge modes:

• Solo: The player goes alone against the Creatures;
• Duo: The Challenge is fought in a two member party. If the player is in a party fighting in any of the common worlds, the game will try to enter the challenge with that partner;
• Group: A group of 6 players fights the Challenge.

How to enter a Challenge

First Page of Challenges

Available Duo/Group Queues

Challenge Queue

Fighting the Challenge

Challenge Completion Currency Rewards

To enter a Challenge, the player must open the Game tab and select the Challenges icon. Then, he must choose the difficulty, mode, and Challenge. If Duo or Group mode is chosen, the player will enter a Challenge Queue, waiting for more players to join. It is also possible to check the open queues, joining another player's challenge. When setting up a Challenge, is possible to set a minimum level or an access password. The challenge creator can click the Start Now button to begin a challenge with fewer than the maximum number of players. In Group Challenges, any player can start the challenge early if they are 100+ levels above the challenge creator, or if 4+ players are in the queue.

Challenges marked with a blue background have an access password. The green check indicates a challenge that you already completed.

Requirements to Enter Challenges

• Bronze
• Silver
• Gold

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	–	–	–	–	–	–	–	–	–
II	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I	Complete Group Bronze I
III	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II	Complete Group Bronze II
IV	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III	Complete Group Bronze III
V	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV	Complete Group Bronze IV

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I	Complete Solo Bronze I
II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II	Complete Solo Bronze II
III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III	Complete Solo Bronze III
IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV	Complete Solo Bronze IV
V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V	Complete Solo Bronze V

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I	Complete Duo Bronze I
II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II	Complete Duo Bronze II
III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III	Complete Duo Bronze III
IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV	Complete Duo Bronze IV
V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V	Complete Duo Bronze V

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V	Complete Group Bronze V
II	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I	Complete Group Silver I
III	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II	Complete Group Silver II
IV	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III	Complete Group Silver III
V	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV	Complete Group Silver IV

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I	Complete Solo Silver I
II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II	Complete Solo Silver II
III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III	Complete Solo Silver III
IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV	Complete Solo Silver IV
V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V	Complete Solo Silver V

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I	Complete Duo Silver I
II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II	Complete Duo Silver II
III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III	Complete Duo Silver III
IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV	Complete Duo Silver IV
V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V	Complete Duo Silver V

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V	Complete Group Silver V
II	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I	Complete Group Gold I
III	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II	Complete Group Gold II
IV	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III	Complete Group Gold III
V	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV	Complete Group Gold IV

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I	Complete Solo Gold I
II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II	Complete Solo Gold II
III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III	Complete Solo Gold III
IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV	Complete Solo Gold IV
V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V	Complete Solo Gold V

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I	Complete Duo Gold I
II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II	Complete Duo Gold II
III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III	Complete Duo Gold III
IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV	Complete Duo Gold IV
V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V	Complete Duo Gold V

Challenge Final Boss Damage

Creatures in challenges undergo a constant level pattern. If

$x$ represents the level of the first monster in a particular Challenge, each successive monster in the Challenge will be

$x/5$ levels stronger than the preceding monster. This is equal to

$Level = x \cdot (1+(0.2(Stage-1)))$ . In the following below tables the HP of the final bosses is shown without the HP reduction (Hunting Upgrades) effect. If needed look at the HP reduction table. The HP of the tables were calculated by the formula:

$HP = 4 \cdot ((LVL)^2 + 5)$

• Bronze
• Silver
• Gold

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	2,724	5,496	10,836	56,664	200,724	571,556	6.35 M	14.288 M	25.401 M
II	92,436	204,324	369,684	2.039 M	7.225 M	20.575 M	228.614 M	514.382 M	914.457 M
III	817,236	1.86 M	3.297 M	18.352 M	65.028 M	185.177 M	2.057 B	4.629 B	8.23 B
IV	4.064 M	9.144 M	16.257 M	90.63 M	321.126 M	914.457 M	10.16 B	22.861 B	40.642 B
V	57.153 M	128.595 M	228.614 M	1.274 B	4.515 B	12.859 B	141.884 B	321.489 B	571.536 B

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	11,684	26,264	46,676	260,120	921,620	2.624 M	29.16 M	65.610 M	116.64 M
II	419,924	944,804	1.679 M	9.363 M	33.177 M	94.478 M	1.049 B	2.362 B	4.199 B
III	3.779 M	8.503 M	15.116 M	84.272 M	298.598 M	850.305 M	9.447 B	21.258 B	37.791 B
IV	18.662 M	41.99 M	74.649 M	416.16 M	1.474 B	4.199 B	46.656 B	104.976 B	186.624 B
V	262.44 M	590.49 M	1.049 B	5.852 B	20.736 B	59.049 B	656.1 B	1.476 T	2.624 T

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	46,676	104,996	186,644	1.04 M	3.686 M	10.497 M	116.64 M	262.440 M	466.56 M
II	1.679 M	3.779 M	6.718 M	37.454 M	132.71 M	377.913 M	4.199 B	9.448 B	16.796 B
III	15.116 M	34.012 M	60.466 M	337.089 M	1.194 B	3.401 B	37.791 B	85.031 B	151.165 B
IV	74.649 M	167.961 M	298.598 M	1.664 B	5.898 B	16.796 B	186.624 B	419.904 B	746.496 B
V	1.049 B	2.361 B	4.199 B	23.409 B	82.944 B	236.196 B	2.624 T	5.905 T	10.497 T

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	161.391 M	362.826 M	645.16 M	3.597 B	12.745 B	36.294 B	403.275 B	907.371 B	1.613 T
II	390.457 M	878.055 M	1.562 B	8.704 B	30.84 B	87.824 B	975.827 B	2.196 T	3.903 T
III	842.857 M	1.896 B	3.212 B	17.341 B	66.588 B	189.621 B	2.106 T	4.741 T	8.427 T
IV	1.66 B	3.748 B	6.666 B	37.164 B	131.681 B	374.984 B	4.166 T	9.375 T	16.665 T
V	27.662 B	62.24 B	110.649 B	616.853 B	2.185 T	6.224 T	69.115 T	155.601 T	276.623 T

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	740.71 M	1.666 B	2.962 B	16.517 B	58.525 B	166.658 B	1.851 T	4.166 T	7.407 T
II	1.792 B	4.032 B	7.169 B	39.968 B	141.616 B	403.275 B	4.48 T	10.082 T	17.923 T
III	3.869 B	8.707 B	15.479 B	86.294 B	305.764 B	870.712 B	9.674 T	21.768 T	38.698 T
IV	7.652 B	17.218 B	30.611 B	170.651 B	604.661 B	1.721 T	19.131 T	43.047 T	76.527 T
V	127.02 B	285.797 B	508.083 B	2.832 T	10.036 T	28.579 T	317.552 T	714.493 T	1.27 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	2.962 B	6.666 B	11.851 B	66.069 B	234.101 B	666.639 B	7.407 T	16.666 T	29.628 T
II	7.169 B	16.131 B	28.677 B	159.872 B	566.466 B	1.613 T	17.923 T	40.328 T	71.693 T
III	15.479 B	34.828 B	61.917 B	345.179 B	1.223 T	3.482 T	38.698 T	87.071 T	154.793 T
IV	30.611 B	68.874 B	122.444 B	682.606 B	2.418 T	6.887 T	76.527 T	172.187 T	306.11 T
V	508.083 B	1.143 T	2.032 T	11.329 T	40.144 T	114.318 T	1.27 Q	2.858 Q	5.08 Q

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	48.199 B	108.446 B	192.794 B	1.074 T	3.808 T	10.844 T	120.497 T	271.119 T	481.988 T
II	80.116 B	180.259 B	320.462 B	1.786 T	6.33 T	18.025 T	200.288 T	450.648 T	801.152 T
III	127.977 B	287.956 B	511.911 B	2.853 T	10.111 T	28.794 T	319.943 T	719.873 T	1.279 Q
IV	197.605 B	444.611 B	790.42 B	4.406 T	15.613 T	44.461 T	494.012 T	1.112 Q	1.976 Q
V	526.727 B	1.185 T	2.106 T	11.745 T	41.617 T	118.513 T	1.316 Q	2.963 Q	5.267 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	221.321 B	497.972 B	885.285 B	4.935 T	17.487 T	49.797 T	553.303 T	1.245 Q	2.213 Q
II	367.876 B	827.721 B	1.471 T	8.203 T	29.066 T	82.772 T	919.690 T	2.069 Q	3.678 Q
III	587.651 B	1.322 T	2.350 T	13.104 T	46.431 T	132.221 T	1.469 Q	3.306 Q	5.876 Q
IV	907.370 B	2.041 T	3.629 T	20.233 T	71.693 T	204.158 T	2.268 Q	5.104 Q	9.073 Q
V	2.418 T	5.441 T	9.674 T	53.934 T	191.102 T	544.195 T	6.046 Q	13.605 Q	24.186 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	885.285 B	1.991 T	3.541 T	19.741 T	69.948 T	199.189 T	2.213 Q	4.980 Q	8.852 Q
II	1.471 T	3.310 T	5.886 T	32.813 T	116.267 T	331.088 T	3.678 Q	8.277 Q	14.715 Q
III	2.350 T	5.288 T	9.402 T	52.417 T	185.726 T	528.885 T	5.876 Q	13.222 Q	23.506 Q
IV	3.629 T	8.166 T	14.517 T	80.935 T	286.773 T	816.633 T	9.073 Q	20.416 Q	36.294 Q
V	9.674 T	21.767 T	38.698 T	215.737 T	764.411 T	2.176 Q	24.186 Q	54.420 Q	96.745 Q

Challenge Final Boss Damage with HP reduction level 100

Level 100 HP Reduction multiplies the total HP to 0.8125 of their base HP

• Bronze
• Silver
• Gold

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	2,213	4,466	8,804	46,040	163,088	464,389	5.159 M	11.609 M	20.638 M
II	75,104	166,013	300,368	1.656 M	5.87 M	16.717 M	185.749 M	417.936 M	742.996 M
III	664,004	1.511 M	2.679 M	14.911 M	52.835 M	150.456 M	1.671 B	3.761 B	6.686 B
IV	3.302 M	7.508 M	13.208 M	73.637 M	260.915 M	742.996 M	8.255 B	18.575 B	33.022 B
V	46.437 M	104.483 M	185.749 M	1.035 B	3.669 B	10.448 B	116.093 B	261.210 B	464.373 B

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	9,493	21,340	37,924	211,348	748,816	2.132 M	23.692 M	53.308 M	94.77 M
II	341,188	767,653	1.078 M	7.607 M	26.956 M	76.763 M	852.93 M	1.919 B	3.412 B
III	3.07 M	6.908 M	12.282 M	68.471 M	242.611 M	690.873 N	7.676 B	17.272 B	30.705 B
IV	15.163 M	34.117 M	60.652 M	338.13 M	1.198 B	3.411 B	37.908 B	85.293 B	151.632 B
V	213.232 M	479.773 M	852.93 M	4.754 B	16.848 B	47.977 B	533.081 B	1.199 T	2.132 T

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	37,924	85,309	151,648	845,341	2.995 M	8.529 M	94.77 M	213.233 M	379.08 M
II	1.364 M	3.07 M	5.458 M	30.431 M	107.827 M	307.054 M	3.411 B	7.676 B	13.646 B
III	12.828 M	27.634 M	49.128 M	273.885 M	970.444 M	2.763 B	30.705 B	69.087 B	122.821 B
IV	60.652 M	136.468 M	242.611 M	1.352 B	4.792 B	13.646 B	151.632 B	341.172 B	606.528 B
V	852.93 M	1.919 B	3.411 B	19.019 B	67.392 B	191.909 B	2.132 T	4.798 T	8.529 T

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	131.130 M	294.796 M	524.192 M	2.922 B	10.355 B	29.489 B	327.661 B	737.239 B	1.310 T
II	317.246 M	713.420 M	1.268 B	7.072 B	25.058 B	71.357 B	792.860 B	1.784 T	3.171 T
III	684.821 M	1.540 B	2.739 B	15.269 B	54.103 B	154.067 B	1.711 T	3.852 T	6.847 T
IV	1.354 B	3.046 B	5.416 B	30.195 B	106.991 B	304.675 B	3.385 T	7.617 T	13.541 T
V	22.475 B	50.570 B	89.902 B	501.193 B	1.775 T	5.057 T	56.189 T	126.426 T	224.756 T

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	601.827 M	1.354 B	2.407 B	13.420 B	47.551 B	135.411 B	1.504 T	3.385 T	6.018 T
II	1.456 B	3.276 B	5.825 B	32.474 B	115.063 B	327.661 B	3.640 T	8.192 T	14.562 T
III	3.144 B	7.074 B	12.576 B	70.114 B	248.433 B	707.454 B	7.860 T	17.686 T	31.442 T
IV	6.217 B	13.990 B	24.871 B	138.654 B	491.287 B	1.399 T	15.544 T	34.975 T	62.178 T
V	103.204 B	232.210 B	412.818 B	2.301 T	8.154 T	23.221 T	258.011 T	580.525 T	1.032 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	2.407 B	5.416 B	9.629 B	53.681 B	190.207 B	541.644 B	6.018 T	13.541 T	24.073 T
II	5.825 B	13.106 B	23.300 B	129.896 B	460.254 B	1.310 T	14.562 T	32.766 T	58.250 T
III	12.576 B	28.298 B	50.307 B	280.458 B	993.735 B	2.829 T	31.442 T	70.745 T	125.769 T
IV	24.871 B	55.960 B	99.485 B	554.617 B	1.965 T	5.596 T	62.178 T	139.902 T	248.714 T
V	412.818 B	928.840 B	1.651 T	9.205 T	32.617 T	92.884 T	1.032 Q	2.322 Q	4.128 Q

• Solo
• Duo
• Group

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	39.162 B	88.112 B	156.648 B	873.279 B	3.094 T	8.811 T	97.903 T	220.284 T	391.615 T
II	65.094 B	146.459 B	260.377 B	1.451 T	5.143 T	14.646 T	162.734 T	366.152 T	650.936 T
III	103.979 B	233.961 B	415.928 B	2.318 T	8.215 T	23.395 T	259.953 T	584.896 T	1.039 Q
IV	160.554 B	361.246 B	642.216 B	3.580 T	12.685 T	36.124 T	401.385 T	903.117 T	1.605 Q
V	427.966 B	962.923 B	1.711 T	9.543 T	33.814 T	96.292 T	1.069 Q	2.407 Q	4.279 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	179.823 B	404.603 B	719.294 B	4.009 T	14.208 T	40.460 T	449.558 T	1.012 Q	1.798 Q
II	298.899 B	672.523 B	1.195 T	6.665 T	23.616 T	67.252 T	747.248 T	1.681 Q	2.988 Q
III	477.466 B	1.074 T	1.909 T	10.647 T	37.725 T	107.429 T	1.193 Q	2.686 Q	4.774 Q
IV	737.238 B	1.658 T	2.948 T	16.439 T	58.250 T	165.878 T	1.843 Q	4.147 Q	7.372 Q
V	1.965 T	4.421 T	7.86 T	43.821 T	155.271 T	442.158 T	4.912 Q	11.054 Q	19.651 Q

Difficulty Tier	Rats!	Fruitarian No More	Tribal Smash	Uhg A Thug!	WereThings	Under the Sea	Rednex	Galactic Snackbar	Infested
I	719.294 B	1.618 T	2.877 T	16.039 T	56.833 T	161.841 T	1.798 Q	4.046 Q	7.192 Q
II	1.195 T	2.690 T	4.782 T	26.661 T	94.466 T	269.009 T	2.988 Q	6.725 Q	11.955 Q
III	1.909 T	4.297 T	7.639 T	42.588 T	150.902 T	429.719 T	4.774 Q	10.743 Q	19.098 Q
IV	2.948 T	6.635 T	11.795 T	65.759 T	233.003 T	663.514 T	7.372 Q	16.588 Q	29.489 Q
V	7.86 T	17.863 T	31.442 T	175.286 T	621.084 T	1.768 Q	19.651 Q	44.216 Q	78.606 Q

• This table was made considering that the HP was rounded up, though abbreviations are rounded down.

Special Challenges

During Events it is possible to see special Challenges:

• Easter Eggin (Easter Event)
• Angry Mothers (Angry Mothers Day)
• Goblin Hoard (Invasion Event)

Series Challenges

Series challenges are solo only and involve an infinitely escalating set of Creatures, starting at Tier 0. Returning to a Challenge starts you at the first Creature you have not defeated. Every 5 Creatures is a Boss but does not have the 4x HP bonus.

You can manually enter a level higher than the one you have currently completed to skip levels and be automatically rewarded for the ones that you skipped, if you defeat the chosen stage.

Series challenges currently have a maximum tier of 275.

Infinite World Challenge

The only Series Challenge is the Infinite World Challenge. This challenge has 170 stages per tier with one creature per stage, representing all 170 unique creatures in IOU. The series challenge keeps track of how many stages the player has completed, rewarding 10 Challenge Points  every stage. Every stage completed rewards 1% bonus damage, and every 5 stages completed rewards 5% bonus damage. The % bonuses within Series stack; total damage bonus from the challenge can be seen under the Series tab of the Challenge screen. Once all 170 stages have been completed, the player will be able to challenge the next tier.

The difficulty rating is given by: $D = (170 \cdot Tier) + Stage$

The levels of the monsters in the infinite challenge is given by: $L = 100 \cdot D^2 \cdot (1 + Tier^2/10)^2$

Both the Series total percentage bonus and Challenge Point Milestones bonus are added together.