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