Here is the full list of all 35 Idle Pins achievements.
Play for 6 months
Get 400 S+ Rank tunes
Tune 60 different Pins
Get 200 S+ Rank tunes
Practice some Alchemy
Overcharge 1,000 Leaders
Get 50 S+ Rank tunes
Discover 140 different Pins
Overcharge 1,000,000
Unlock The Tower
Find 50 Slimes
Play for 1 month
Tune 30 different Pins
Get 10 S+ Rank tunes
Play for 10 days
Overcharge 100 Leaders
Overcharge 100,000 enemies
Find 10 Slimes
is Arkshija real?
Join dev's streaming
Tune 10 different Pins
Discover 50 different Pins
Find a Slime
Play for 1 day
Overcharge 1,000 enemies
Play for 1 hour
Tune your first Pin
Discover 10 different Pins
Redeem a code
Finish the tutorial
Overcharge 10,000,000 enemies
Overcharge 50,000,000 enemies
Overcharge 10,000 Leaders
Get 800 S+ Rank tunes
Max autofuse Upgrades