More about Antimatter Dimensions:
General Info: DimensionsTicksAchievements
Pre-Infinity: Soft ResetDimensional SacrificeAntimatter Galaxy
Pre-eternity: InfinityInfinity UpgradesChallengesAutobuyersBreaking InfinityInfinity DimensionsReplicanti
Post-eternity: EternityEternity MilestonesTime DimensionsTime StudiesEternity UpgradesEternity ChallengesTime Dilation
Misc: GuideTerminologyCheating

Like Challenges, there's Eternity Challenges, where the goal is to reach a certain amount of IP, then Eternity. However, Eternity Challenges requires different criteria to be met for each challenge and costs Time Theorems. For the first five times you complete each challenge, the requirement, goal, and reward increase. After you have beaten a challenge 5 times, when you beat the challenge again, there will be no change to the challenge. (It will still say you beat the challenge 5 times)

You can purchase an upgrade past an eternity challenge on the time study tree after one clear of the challenge, without needing to repurchase the challenge; though you still need to purchase the upgrade before the challenge.

Upon completion of an Eternity Challenge, your Time Studies tree will be automatically respecced. As a result, imagine the Time Theorem cost of a challenge as a 'loan' that is returned to you upon completion.

Rewards are permanent - you do not have to have the challenge unlocked to keep/use the reward.

In the table below:

n in the reward and requirement refers to the amount of times that particular challenge has been completed, up to 5.

You will not receive the reward for clearing until the first clear, even if the value from the reward exceeds 1.

Number Unlock Requirement Cost (TT) End Point Base End Point Increase Description Reward Details
1 20000n eternities 30 1e1800 1e200 Time Dimensions are disabled. Multiplier for all Time Dimensions (based on time spent this Eternity) Time spent in eternity (s*100)0.3+(n*0.05)
2 1300+150n

tickspeed upgrades gained from time dimensions

35 1e975 1e175 Infinity Dimensions are disabled. Infinity power affects 1st Infinity Dimension with reduced effect, Currently: ()x max(1,min(1e100,(infinity power)0.015/(7-n)))
3 17300+1250n 8th dimensions 40 1e600 1e75 Dimensions 5-8 don't produce anything.

Dimensional sacrifice is disabled.

Increase the multiplier for buying 10 dimensions, Currently: ()x Adds 0.8n to previous mult. See [] for more details.
4 1e8+5e7n infinities 70 1e2750 1e550 All infinitied stat multipliers and generators are disabled.

You must complete the challenge in 20-4n infinities or less. (at least 0 infinities)

Infinity Dimension multiplier from unspent IP, Currently: ()x min(1e200,IP0.003+0.002n)

2 Million Infinities achievement reward, infinitiedGeneration Infinity Upgrade, and Time Study 32 are disabled.

5 160+14n galaxies 130 1e750 1e400 Galaxy cost increase scaling starts instantly (Normally at 100 galaxies).

Dimension boost costs scaling is massively increased.

Galaxy cost scaling starts () galaxies later. 5n
6 40+5n replicanti galaxies 85 1e850 1e250 You can't gain galaxies normally,

but the cost of upgrading your max replicanti galaxies is massively reduced.

Further reduction dimension cost multiplier increase, Currently: ()x 3-0.2n
7 1e500000*1e300000^n antimatter 115 1e2000 1e530 First Time Dimension produces Eighth Infinity Dimension,

and First Infinity Dimension produces Seventh Dimensions. Tickspeed affects all dimensions normally.

First Time dimension produces Eighth Infinity Dimensions, Currently: () per second. (time shard production/s)0.2n-1
8 1e4000*1e1000^n IP 115 1e1300 1e900 You can only upgrade Infinity Dimensions 50 times, and Replicanti upgrades 40 times. Infinity power powers up replicanti galaxies, Currently: ()% 100((log10(log10(infinity power+1)+1))0.03n-1)
9 1e17500*1e2000^n infinity power 415 1e1750 1e250 You can't buy tickspeed upgrades.

Infinity power instead multiplies time dimensions with greatly reduced effect.

Infinity Dimension multiplier based on time shards, Currently: ()x Challenge: log2(infinity power)4

Reward: min(1e400,(time shards)0.1n)

10 1e100*1e20^n EP 550 1e3000 1e300 Time Dimensions and Infinity Dimensions are disabled.

You gain an immense boost from infinitied stat to normal dimensions (infinitied^1000) Currently: ()x

Time dimensions gain a multiplier from infinitied stat, Currently: ()x Study 31 affects this challenge.
11 Use only the Normal Dimension path 1 1e500 1e200 All dimension multipliers are disabled except for the multipliers

from Infinity power and dimension boosts (to normal dimensions)

Further reduction tickspeed cost multiplier increase, Currently: ()x 2-0.07n
12 Use only the Time Dimension path 1 1e110000 1e12000 The game runs 1000x slower.

You must complete the challenge in 1-0.2n seconds. (Minimum is 0.1 seconds)

Infinity Dimension cost multipliers are reduced. (x^()) 1-0.008n