Darkest of Days achievements

Complete all the levels in the game on the highest difficulty.

Fully upgrade all pistol settings.

Locate and complete the secret mission at the end of the game.

Complete a combat level without using any lethal attacks.

Fully upgrade all rifle settings.

Complete all levels in the WW2 campaign.

Complete all levels in the WW1 campaign.

Die of suffocation underwater.

Complete all levels in the game on normal difficulty or higher.

Kill at least 25 NPCs with your bare hands.

Complete all levels in the Civil War campaign.

Kill yourself with an explosive device.