Here is the full list of all 25 The First Day achievements.
Star your first day at work
Start the first act
Start the second act
Start the third act
Start the fourth act
Start the fifth act
Gain gravitational powers
Gain 2D gravitational powers
Gain 3D gravitational powers
Gain Freeze Power
Die by falling into an abyss
Get killed by a turret
Die in an explosion
Destroy 25 ghosts
Get grilled by a laser
Talk to 20 people
Finish the fifth act
Beat the game without the helping hand
Beat the game without the compass
Beat the game without the seeing the cables
Beat the game with all help activated once
Destroy 100 Turrets
Beat the game in under 10 hours
Beat the game in under 4 hours
Beat the game in under 2 hours