Here is the full list of all 24 Awakened Evil achievements.
Beat stage 1
Beat stage 2
Beat stage 3
Beat stage 4
Beat stage 5
Beat the game on Casual
Beat the game on Normal
Beat the game on Expert
Beat the game on Normal without getting a Game Over
Beat the game on Expert without getting a Game Over
Finish stage 1 without a subweapon
Finish stage 2 without a subweapon
Finish stage 3 without a subweapon
Finish stage 4 without a subweapon
Finish stage 5 without a subweapon
Finish stage 6 without a subweapon
Finish stage 1 at full health
Finish stage 2 at full health
Finish stage 3 at full health
Finish stage 4 at full health
Finish stage 5 at full health
Finish stage 6 at full health
Beat a stage in speedrun mode under in 4 minutes
Beat the game in speedrun mode in under 35 minutes