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