Here is the full list of all 14 Rorschach Plus achievements.
Beat the game without dying or continuing
Cheat
Beat the game
Discover the decentigrating platforms
Discover the gravity balls
Discover the switches
Discover the springs
Discover the portals
Discover the falling and moving platforms
Discover the fuzzies
Finish the tutorial
Die
Open the game
Beat the game without using a single splatter or continuing