Here is the full list of all 45 Paranautical Activity: Deluxe Atonement Edition achievements.
Beat any mode with Tank.
Beat classic mode.
Kill Dahlia after she spawns every set of enemies. Twice.
Kill Dahlia.
Have 30 items at once.
Kill 100 Gileads.
Beat the sixth floor.
Fall into a hole in a hole floor.
Have more armor than health.
Have 69 bombs.
Have 1000 coin dollars.
Let a boss die to poison.
Run out of superweapon ammo.
Beat the fourth floor.
Beat the second floor.
Kill a Tenchi while it's invisible.
Complete a floor without jumping.
Complete a room without taking damage.
Complete a room without attacking.
Complete a floor without taking damage.
Survive a dark floor.
Complete a hole floor without falling in.
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 Gilead
Beat any mode with Bouncer
Beat any mode with Gorton
Beat any mode with David Bowie
Beat any mode with Dynomite.
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.
Get a ghost and survive the floor.
Spawn two ghosts at once.
Kill Dahlia without taking damage.
Kill every boss.
Get every item.
Use every weapon.
Get every achievement.