Here is the full list of all 31 Until I Have You achievements.
Purchase any of the upgrades.
Complete a stage without killing anyone.
Complete a level earning the Second To None Rank.
Get a 100% Rating in any stage.
Watch TV.
Head out of the apartment.
Complete Tutorial.
Achieve 100% accuracy with the GUN.
Kill all the enemies in a stage.
Achieve the lowest ranking possible.
Complete a stage in Chapter Eight with the ALARM going off.
Complete a Boss Stage without using Time-Dilation.
Die 1000 Times.
Kill all the enemies, using the BAT.
Kill all the enemies, using the GUN.
Kill all the enemies, using the LASER.
Kill all the enemies, using the FLAMETHROWER.
Kill Emily's mirage in all its appearances.
Get a 100% Rating in all the stages.
Kill 1000 Enemies.
Kill an enemy while hysteria is high.
Finish the game.
Beat the game in Hard Mode
Unlock any of the work orders.
Unlock all older work orders.
Kill 100 Enemies using the Bat.
Kill 100 Enemies using the Gun.
Kill 100 Enemies using the Laser.
Kill 100 Enemies using the Flamethrower.
Finish Boss Mode in Normal Difficulty.
Finish Boss Mode in Hardcore Difficulty.