RESTRICTED: 2D platformer. Get hit by both enemies, hit your partner, collect 10 coal, take the elevator down then jump off to the top most platform on the right, get crushed by the elevator (on the ground floor, not by the ceiling, and finish the game. It would probably save a few minutes if you went for the elevator death achievement first.
~10 minutes to 100%.
RESTRICTED: 2D platformer. Get hit by both enemies, hit your partner, collect 10 coal, take the elevator down then jump off to the top most platform on the right, get crushed by the elevator (on the ground floor, not by the ceiling, and finish the game. It would probably save a few minutes if you went for the elevator death achievement first.
~10 minutes to 100%.