Here is the full list of all 45 Paranautical Activity: Deluxe Atonement Edition achievements.
Beat 4 floors in a row using only melee attacks.
Spawn two ghosts at once.
Kill Dahlia after she spawns every set of enemies. Twice.
Beat any mode in under 15 minutes.
Beat hardcore mode having gone into every room.
Beat hardcore mode.
Figure out how to get to the 8th floor.
Kill Dahlia without taking damage.
Have 30 items at once.
Beat any mode with Gorton
Complete a hole floor without falling in.
Kill 1000 Jimbaabwehs.
Beat any mode with David Bowie
Beat any mode with Dynomite.
Have 69 bombs.
Beat any mode with Gilead
Kill every boss.
Beat any mode with Bouncer
Survive a dark floor.
Spend all your money gambling.
Get a ghost and survive the floor.
Beat any mode with Tank.
Beat classic mode.
Kill Dahlia.
Beat the sixth floor.
Have 1000 coin dollars.
Beat the fourth floor.
Fall into a hole in a hole floor.
Let a boss die to poison.
Complete a floor without taking damage.
Complete a room without attacking.
Kill 100 Gileads.
Complete a floor without jumping.
Kill a Tenchi while it's invisible.
Run out of superweapon ammo.
Beat the second floor.
Have more armor than health.
Complete a room without taking damage.
Beat any mode without taking items.
Beat Hardcore Mode with all 6 characters.
Beat hardcore mode 10 times.
Beat hardcore mode without spending money.
Get every item.
Use every weapon.
Get every achievement.