Here is the full list of all 14 keyg achievements.
Save PLU.
Get to the Common Cells.
Survive Arrows level.
Save OCT.
Pass.
Get to the Master Center.
Survive the disintegrator level.
Learn the truth.
Complete that one Red Bagels of Death level.
Find another way.
Beginning of the End.
Closer than you think.
That one room where everyone takes pictures.