Here is the full list of all 36 Unnamed Project achievements.
Wait 5 minutes in Room 1 for the Game Developer to get done
Corrupt the game
Smash all display cases
Press the red button to “Close the Game”
Pull out the sword
Eat the candy.
Jump the gate and be free
Push the child
Eat the test cheese
Walk into or jump into the ballpit
Steal Money from Vault
Wack things with the baseball bat
Give flowers to the aliens
Give Flower to the gf of the alien couple
Blow up the level and the aliens
Walk the plank 10 times
Walk the plank 20 times
Walk the plank 50 times
Walk the plank 60 times
Jump while walking over the wooden plank to reach the other side
Jump off the plank into the void
Use WASD till you make it to the end of the maze
Climb the boxes to escape
Interact to break down the dead end wall marked X
Find the Rat King and his loyal army of rat subjects
Find the peace tree
Find the spy bird
Get Placed in Naughty Corner
Wait for 1 minute for the Game Developer to let you out of the corner
Turn around before the Game Developer says you can get out of the corner
Count your riches
Try to Leave
Disagree to Everything the Game Developer asks
Help the Game Developer make a new game
Walk to the end of the hall and accept the cake
Try to leave instead of taking the cake