Here is the full list of all 45 Paranautical Activity: Deluxe Atonement Edition achievements.
Complete a hole floor without falling in.
Kill Dahlia after she spawns every set of enemies. Twice.
Use every weapon.
Have 69 bombs.
Beat hardcore mode 10 times.
Beat Hardcore Mode with all 6 characters.
Beat hardcore mode having gone into every room.
Beat any mode with Tank.
Fall into a hole in a hole floor.
Beat 4 floors in a row using only melee attacks.
Complete a floor without jumping.
Have 30 items at once.
Beat any mode in under 15 minutes.
Let a boss die to poison.
Beat any mode with Gilead
Beat any mode with Dynomite.
Beat any mode without taking items.
Kill every boss.
Beat hardcore mode without spending money.
Beat any mode with David Bowie
Beat hardcore mode.
Figure out how to get to the 8th floor.
Beat any mode with Bouncer
Spawn two ghosts at once.
Get a ghost and survive the floor.
Beat any mode with Gorton
Beat classic mode.
Kill Dahlia without taking damage.
Kill Dahlia.
Complete a room without attacking.
Beat the sixth floor.
Kill 100 Gileads.
Survive a dark floor.
Beat the fourth floor.
Complete a room without taking damage.
Complete a floor without taking damage.
Have 1000 coin dollars.
Have more armor than health.
Kill a Tenchi while it's invisible.
Beat the second floor.
Run out of superweapon ammo.
Spend all your money gambling.
Kill 1000 Jimbaabwehs.
Get every item.
Get every achievement.