Here is the full list of all 21 Cloaks and Capes achievements.
Go Berserk for the first time
Ero Defeated
Morquades Defeated
Essa, Lady of Chaos Defeated
Ordur Defeated
Death Trio defeated
Cha-Hul Defeated
Tezkraml Defeated
Azazel Defeated
Azazel Spirit form Defeated
Son Reincarnated, Peace restored
Honorable enough to Finish Reviving Cloaker's Son's Quest on Hardcore Mode
Get your First PowerUp
Get 4 PowerUps
Reach Level 10 like a true Scholar
Talk to Rowhel, The Frozen in Time Rebellion
Visit Forest of illusion which is.. Not quite yet the Half
Own 1000 or above gold
Own 2000 or above gold
Own 5000 or above gold
Enter Boss Rush Mode for the First time