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.
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?".
Accepted the Governor’s pardon.
Chose a path in "Choice Cube: Three Paths".
Saved XE-47629 from the horrors of the trials.
Made a final choice in "Ending: Trust".
Complete “Columnial” without being burnt by any flamethrowers.
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.
Fly all the way to the lever without touching the ground in “I’m Flying”.
Complete “Seesaws” in less than 20 seconds.
Trigger a spike trap with your body... and survive.
Complete “Trick Jump” in less than 8 seconds.
Acquired a stable version of the D-28 prototype.
Chose the correct number of boxes in "Choice Cube: Remember the Boxes".
Endure the pains of electricity, poisonous gas and fire in a single level, and live to tell the tale!
Complete “Target Practice” without hitting both buttons.
Hit both buttons in “The Pit” from the topmost platform.
Take the high road in “Crouch ‘n Climb”
Complete “3D Puzzle” in less than 60 seconds.
Complete “Hard WMMPs” in less than 10 seconds, without touching the floor.
Picked up the D-27 Magnetic Propulsion Device.