Here is the full list of all 25 TAMASHII achievements.
Enter the corrupted temple
Defeat the guardian of Assiah
Defeat the guardian of Yetzirah
Defeat the guardian of Atziluth
Defeat the guardian of Beriah
Go through Kether
Experience infinity
Survive against the secret Guardian
Find the secret code
Get the Fire stone
Get the Water stone
Get the wind stone
Get the Earth stone
Find the hanging man
Find the secret room
Achieve more than 1500 points on Assiah
Achieve more than 1500 points on Yetzirah
Achieve more than 1000 points on Atziluth
Achieve more than 1500 points on Beriah
Achieve more than 666 points on Kether
Be persistent.
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