Here is the full list of all 100 Antimatter Dimensions achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Buy a 1st Antimatter Dimension
Buy a 4th Antimatter Dimension.
Buy an 8th Antimatter Dimension.
Go Infinite.
Have exactly 99 8th Antimatter Dimensions.
Buy 10 Dimension Boosts.
Buy an Antimatter Galaxy.
Buy 2 Antimatter Galaxies.
Buy a single 1st Antimatter Dimension when you have over 1e150 of them.
Get over ×600 from Dimensional Sacrifice outside of Challenge 8.
Reach Infinity 10 times.
Go Infinite without having any 8th Antimatter Dimensions.
Go infinite in under 2 hours.
Buy an Antimatter Galaxy without Sacrificing.
Buy 16 Infinity Upgrades.
Get the 8th Antimatter Dimension multiplier to be highest, 7th Antimatter Dimension multiplier second highest, etc.
Have antimatter/sec exceed your current antimatter for 30 consecutive seconds.
Get more than 100 Oc ticks per second.
Reach 1 T of all Antimatter Dimensions except the 8th.
Complete 3 Normal Challenges.
Complete all 12 Normal Challenges.
Break Infinity.
Max the interval for Antimatter Dimension and Tickspeed upgrade autobuyers.
Infinity in 10 minutes or less.
Infinity in 1 minute or less.
Complete the Tickspeed Autobuyer Challenge in 3 minutes or less.
Reach 100 M Infinity Points per minute.
Begin generation of Infinity Power.
Get to Infinity without Dimension Boosts or Antimatter Galaxies while in a Normal Challenge.
Complete an Infinity Challenge.
Complete the 3rd Antimatter Dimension Autobuyer Challenge in 10 seconds or less.
Get to Infinity with only a single 1st Antimatter Dimension without Dimension Boosts or Antimatter Galaxies, while in the 2nd Antimatter Dimension Autobuyer Challenge.
Get 9.9999e9999 antimatter.
Unlock the 4th Infinity Dimension.
Infinity in under 250ms.
Complete all 8 Infinity Challenges.
Big Crunch for 1e150 Infinity Points.
Infinity 2 M times.
Big Crunch for 1e200 Infinity Points in 2 seconds or less.
Gain 1.8e308 Replicanti in 1 hour.
Go Eternal.
Get the sum of Infinity Challenge times under 6.66 seconds.
Unlock the 8th Infinity Dimension.
Eternity without buying Antimatter Dimensions 1-7.
Get all Eternity milestones.
Reach 9.99999e999 Infinity Points.
Eternity in under 30 seconds.
Have 308 Tickspeed upgrades from Time Dimensions.
Get 10 Replicanti Galaxies in 15 seconds.
Eternity with less than 10 Infinities.
Have all your Infinities in your past 10 Infinities be at least 1.8e308 times higher Infinity Points than the previous one.
Eternity in under 250ms.
Fail an Eternity Challenge.
Eternity with only 1 Infinity.
Eternity without buying Antimatter Dimensions 2-8.
Complete 50 unique Eternity Challenge tiers.
Have your Infinity Power per second exceed your Infinity Power for 60 consecutive seconds during a single Infinity.
Reach 1e90 Infinity Points without having any Infinities or any 1st Antimatter Dimensions in your current Eternity.
Reach 1.8e308 Eternity Points.
Get 2 B Banked Infinities.
Reach 1e200,000 Infinity Points without buying any Infinity Dimensions or the ×2 Infinity Point multiplier.
Reach 1e18000 Replicanti.
Get more than 1e8,296,262 ticks per second.
Dilate time.
Reach 1e26000 Infinity Points without any Time Studies while Dilated.
Make a new Reality.
Unlock the automator.
Have all your Eternities in your past 10 Eternities be at least 1.8e308 times higher Eternity Points than the previous one.
Unlock the Black Hole.
Have all Perks bought.
Have all Reality upgrades bought.
Reality with one of each basic Glyph type.
Get 800 Antimatter Galaxies without buying 8th Antimatter Dimensions in your current Infinity.
Reality without producing antimatter.
Reality in under 5 seconds (game time).
Play for 13.7 billion years.
Reality without buying Time Theorems.
Get a Glyph with 4 effects.
Get 1e100,000,000 antimatter while Dilated.
Have every Time Study at once.
Complete all the Eternity Challenges 5 times with less than 1 second (game time) in your current Reality.
Get 1.8e308 Infinities.
Get a level 5,000 Glyph with all Glyph level factors equally weighted.
Get a Glyph with level exactly 6,969.
Reach 1.8e308 Reality Machines.
Get 50 total Ra Celestial Memory levels.
Sacrifice every sacrificable Glyph type at least once.
Reality for 1.8e308 Reality Machines without having any Charged Infinity Upgrades, having any equipped Glyphs, or buying any Triad Studies.
Get a Singularity.
Get 25,000 of all Alchemy Resources.
Annihilate your Dark Matter Dimensions.
Complete all Singularity Milestones at least once.
Get 100,000 Antimatter Galaxies.
Doom your Reality.
Permanently gain back all Antimatter Dimension autobuyers.
Encounter the third Pelle Strike.
Encounter the fourth Pelle Strike.
Purchase Time Study 181 while Doomed.
Unlock Dilation while Doomed.
Beat the game.