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: GuideTerminology

This is at 2^1024 (~1.7976931348623159e308).

Big CrunchEdit

This happens at Infinity antimatter. You'll have to Big Crunch to continue. Your first Big Crunch unlocks the Infinity tab, where you can spend your Infinity Points (IP). Each Crunch gives 1 IP at first, but that's upgradeable. The upgrades have to be bought from top to bottom, except the upgrade completely at the bottom, which doubles your IP gains from all sources. This one can be bought multiple times, doubling IP gains but costing 10x more at each level, but you can only start buying it after you get the 16 other upgrades.

What happens when I Big Crunch?Edit

Everything that doesn't depend on Infinity gets reset. Zero Dimensions, zero Galaxies, no Shift/Boost. That also does mean that you keep everything related to Infinity (and bigger), like your IP and the upgrades bought with them, and you also get a new run to Infinity (which is useful for some achievements).

What do I unlock when I (first) Big Crunch? Edit

Upon Big Crunch, you will unlock Infinity Upgrades to spend your IP and also Challenges. You will also automatically unlock the First Dimension Autobuyer, and gain an achievement.

What's next? Edit

Break Infinity.