Destroy the Tripod Nest

Complete the Solar Array Puzzle

Win the fight at the School

Kill a Stalker with the Seeker Rifle while in Zoom Mode

Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)

Use Quick Heal ten times (single player only)

Survive the Train Sequence

Get your first Suit

Achieve level 10 and gain the Controller Role

Traveled to the world below, seeking a way to alter fate.

Create a combo weapon

Discerned the full attributes of 100 enemies.

Complete all levels on Normal