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