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