Here is the full list of all 22 SKIP achievements.
Set a Crash Course
Find the Data Disk
Solve the Computer Puzzle
Find Page F
Solve the LOCK Puzzle
Solve the Final Floor Puzzle
Find Fuse C
Find Page E
Solve Another Floor Puzzle
Find Fuse B
Find Page D
Solve the GATE Puzzle
Find the Flashlight
Find Page B
Solve the Floor Puzzle
Find Fuse A
Find Page A
That's not in the Game
Find Page C
You Waited
The Origin
Find Page G