Here is the full list of all 22 Final Exerion achievements.
Clear stage 1
Clear stage 2
Clear stage 3
Clear stage 5
Clear stage 6
Clear stage 7
Clear stage 9
Clear stage 10
Clear stage 11
Clear stage 12
Read the whole manga in the epilogue without skipping a page
Clear the game in Easy mode
Clear the game in Hard mode
Equip yourself with E2CELL
Get a PERFECT in Bonus Stage 4
Get a PERFECT in Bonus Stage 8
Get a PERFECT in Bonus Stage 5 (Damage rate 0%)
Make Verde neigh at you
Meet White Verde
Do a purge 40 times
Play the game 40 times in any mode
Call a cell 40 times