Full list of all 32 Idle Spiral achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 22 achievements, and there is 1 DLC pack containing 10 achievements.
Reach T15
Defeat PI
Reach T10
Upgrade k 10000 times
Upgrade g 2000 times
Upgrade f 2000 times
Upgrade d 3000 times
Upgrade c 4000 times
Upgrade a 10000 times
Upgrade e 2000 times
Upgrade b 5000 times
Reach T5
Defeat Beta
Defeat Alpha
z reaches 100
Reach T2
Do Tornado Prestige for the first time
Defeat Kappa
Do Prestige for the first time
Defeat training
Do omega Prestige for the first time
r reaches 1K
Reach T27
Reach T50
Reach T90
Get “The secret of a triangle”
Get “The secret of the Universe”
Get “Unprecedented Number”
Get “The Soul of Gauss”
Reach the attack speed cap
Reach 1 Understanding level of Pythagorean theorem
Reach 1 Understanding level of Archimedes' spiral