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