Activate your first Electrical Substation.

Kill a Spitter using a ranged weapon.

Activate your first Water Tower.

Defeat your first GRE Anomaly.

Modify your weapon for the first time.

Use an Inhibitor for the first time.

Perform a Perfect Block 10 times in a row without taking damage.

Destroy the helicopter without defeating any other enemies

Defeat 4 enemies with one C4 detonation

Stealth take-down 10 armored enemies with melee by first removing their helmets without being detected

Defeat 5 consecutive enemies with the silenced pistol without being detected

Use every gun in the game