Complete the game.

Collect 50% of the medals.

Collect all documents and objects.

Collect all the medals.

Complete the Challenge Room.

Complete a hack.

Sweep 3 Malthusians off their feet with water.

Kill 5 Mathusians with fire or electricity.

Kill 2 Malthusians within a timed chain attack.

Save Chief Billingham.

Neutralize 10 Malthusians in underwater combat.

Drown a Malthusian.

Set 3 Malthusians on fire.