Finish the mission at the basic level of difficulty.

Use the healing terminal when you have only the last segment on the health bar.

Use only the stungun to finish the mission.

Finish the mission at the basic level of difficulty.

Collect all credits in the whole level.

Eliminate the combat turret without getting hit.

Finish the mission at the basic level of difficulty.

Kill at least 5 zombies at the same time without reloading.

Eliminate the miniboss without getting hit.

Survive within the specified time limit.

Survive within the specified time limit.

Survive within the specified time limit.

Survive within the specified waves of infected enemies.

Survive within the specified waves of infected enemies.

Survive within the specified waves of infected enemies.

Kill 100 monsters with headshots.

Use the regeneration chamber 20 times.

Upgrade at least one weapon up to the maximum of all your values.

You must collect 500.000 of all available credits in whole game.

Killing 50 zombies with the stungun.

Killing 100 zombies with the stungun.

Killing 500 zombies with the stungun.

Killing 500 zombies.

Killing 1000 zombies.