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