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