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