Kill the Tharsis Refinery ArcTrooper in under 1 minute 30 seconds

Kill 3 Helghast at once using the surrounding environment

Complete Salamun District on any difficulty level

Kill 30 Helghast using the StA3 fixed gun emplacement

Complete Corinth River on any difficulty level

Finish the game in under 12 hours.

Explore every part of every region.

Kill the Alchemist in his Observatory.

Kill 10 generic enemies before they spawn.

Collect 600 Light Seeds.

Collect 500 Light Seeds.

Kill the Hunter in his Lair.

Throw 10 Soldiers of Ahriman into pits.