Here is the full list of all 100 Idle Ultimate achievements.
Perform the prestige restart
Buy your first prestige upgrade
Get the first rank point
Get the first prestige point
Buy 10 multipliers
Get 10 MP
Buy 250 generator upgrades
Unlock the first multiplier
Claim your first reward
Get the first bet point
Get the first multiplier point
Buy your first generator
Get the first critical income
Get 1K money
Buy 50 generator upgrades
Open and read the tutorial
Get the first money income
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Get 1B money
Get 1Qa money
Get 1Sx money
Get 1Oc money
Get 50 MP
Get 250 MP
Get 1250 MP
Get 6250 MP
Get 5 PP
Get 25 PP
Get 125 PP
Get 625 PP
Get 3125 PP
Get 20 BP
Get 100 BP
Get 500 BP
Get 2500 BP
Get 12500 BP
Get 15 RP
Get 75 RP
Get 375 RP
Get 1875 RP
Get 9375 RP
Buy 5 generators
Buy 20 generators
Buy 80 generators
Buy 320 generators
Buy 1280 generators
Buy 40 multipliers
Buy 160 multipliers
Buy 640 multipliers
Buy 2560 multipliers
Get investment reward 5 times
Get investment reward 20 times
Get investment reward 80 times
Get investment reward 320 times
Get investment reward 1280 times
Perform 20 conversions
Perform 80 conversions
Perform 320 conversions
Perform 1280 conversions
Perform 5120 conversions
Perform 20 bets
Perform 80 bets
Perform 320 bets
Perform 1280 bets
Perform 5120 bets
Claim 5 rewards
Claim 20 rewards
Claim 80 rewards
Claim 320 rewards
Claim 1280 rewards
Buy 5 prestige upgrades
Buy 20 prestige upgrades
Buy 80 prestige upgrades
Buy 320 prestige upgrades
Buy 1280 prestige upgrades
Buy 1250 generator upgrades
Buy 6250 generator upgrades
Buy 31250 generator upgrades
Win bet 10 times
Win bet 40 times
Win bet 160 times
Win bet 640 times
Win bet 2560 times
Lose bet 10 times
Lose bet 40 times
Lose bet 160 times
Lose bet 640 times
Lose bet 2560 times
Complete the main goals
Make your first investment
Perform the first conversion
Make your first bet
Make your first rank investment
Win a bet for the first time
Lose a bet for the first time
Withdraw investment funds
Evolve your first generator
Switch the game theme
Switch the currencies display
Skip the current music