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