Here is the full list of all 13 Cemetery Warrior 4 achievements.
Finish the first room
Finish the game on Easy mode
Finish the game on medium mode.
Finish the game on hard mode.
Kill third boss on hard mode with 50% health.
Kill second boss on hard mode with 70% health
Kill first boss on hard mode with 100% health.
Collect maximum ammo and three Demon Roar.
Collect 300 souls.
Finish first room in 4 chapter with 100% health on Hard Mode.
Finish first room on 2 chapter with 100% health.
Kill five enemies by one granade launcher shot.
Finish the game on easy mode without lost.