Here is the full list of all 11 TWWWR achievements.
Beat the extra ending on expert
Beat the game without killing any common enemies
Beat the game on expert
beat the game in under 35 minutes
Collect all of the trinkets
Go home early
Heal the tower
Finish the game on any difficulty
Beat the 3 main arena stages
Finish the Lily sidequest
Collect half of the trinkets