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