Here is the full list of all 36 Criminal Girls: Invite Only achievements.
Cleared Purgatory.
Viewed Alice's Individual ED.
Alice turned into a Knight.
Cleared the Education Block.
Cleared the Frost Block and brought everyone together!
Cleared the Inferno Block.
Cleared the Morass Block.
Cleared Prison Block.
Cleared XF: Warden's Block.
You are Hell's champion.
You cleared the Garden of Memories.
Kisaragi turned into a Knight.
Ran turned into a Knight.
Tomoe turned into a Knight.
Yuko turned into a Knight.
Shin turned into a Knight.
Miu turned into a Knight.
Himekami turned into a Knight.
Completed Kisaragi's Wish.
Completed Ran's Wish.
Completed Alice's Wish.
Completed Tomoe's Wish.
Completed Sako's Wish.
Completed Yuko's Wish.
Completed Shin's Wish.
Completed Miu's Wish.
Completed Himekami's Wish.
Viewed Kisaragi's Individual ED.
Viewed Ran's Individual ED.
Viewed Tomoe's Individual ED.
Viewed Sako's Individual ED.
Viewed Yuko's Individual ED.
Viewed Shin's Individual ED.
Completed the game.
Discovered the hidden ending.
Sako turned into a Knight.