Here is the full list of all 29 Magnetic: Cage Closed achievements.
Play through all tiers and pick an ending in under 1 hour & 15 minutes.
Find all 9 endings.
Chose a path in "Choice Cube: Three Paths".
Accepted the Governor’s pardon.
Take the high road in “Crouch ‘n Climb”
Hit both buttons in “The Pit” from the topmost platform.
Complete “Target Practice” without hitting both buttons.
Endure the pains of electricity, poisonous gas and fire in a single level, and live to tell the tale!
Complete “3D Puzzle” in less than 60 seconds.
Complete “Trick Jump” in less than 8 seconds.
Complete “Hard WMMPs” in less than 10 seconds, without touching the floor.
Complete “Seesaws” in less than 20 seconds.
Made a final choice in "Ending: Vengeance or Freedom".
Play through all tiers and pick an ending in under 2 hours & 30 minutes.
Made a final choice in "Ending: Are We Done Playing Games?".
Complete “Columnial” without being burnt by any flamethrowers.
Made a final choice in "Ending: Trust".
Pick up the Magnet Gun in Tier 4.
Pick a path in "Choice Cube: A Matter of Trust”.
Found the Magnet Gun in Tier 3.
Went to the public bathroom.
Left confinement without proper escort.
Granted XE-47629 the opportunity to avoid certain death.
Saved XE-47629 from the horrors of the trials.
Fly all the way to the lever without touching the ground in “I’m Flying”.
Trigger a spike trap with your body... and survive.
Acquired a stable version of the D-28 prototype.
Chose the correct number of boxes in "Choice Cube: Remember the Boxes".
Picked up the D-27 Magnetic Propulsion Device.