Open 15 locked safe boxes.

Become a true ranger.

Complete the game in Survival Mode.

Kill 30 enemies with a flamethrower.

On the level OUTPOST reach the radio tower and broadcast the commander's message.

Kill 20 lurkers.

Kill 100 nosalises.

Kill 100 enemies with assault rifles.

Kill 100 Human Enemies.

Disarm 15 wire traps.

Blow up the tunnel and airlock at CURSED STATION.

Kill 10 Enemies in a row without taking any damage.

Wipe your Gas Mask 20 times.