Here is the full list of all 36 Criminal Girls: Invite Only achievements.
Viewed Alice's Individual ED.
Viewed Tomoe's Individual ED.
Viewed Yuko's Individual ED.
Viewed Sako's Individual ED.
Viewed Shin's Individual ED.
Viewed Kisaragi's Individual ED.
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.
Himekami turned into a Knight.
Miu turned into a Knight.
Cleared XF: Warden's Block.
Completed Kisaragi's Wish.
Completed Sako's Wish.
Completed Shin's Wish.
Completed Yuko's Wish.
Shin turned into a Knight.
Kisaragi turned into a Knight.
Sako turned into a Knight.
Yuko turned into a Knight.
Completed Tomoe's Wish.
Completed Alice's Wish.
Tomoe turned into a Knight.
Alice turned into a Knight.
Cleared Purgatory.
Viewed Ran's Individual ED.
Completed Ran's Wish.
Ran 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.