OutofCheese

Secret Achievement

Colonel

Score 1,000,000 points in defense mode

Veteran

Survive for 5:00 in endless night mode

Challenger

Play through a deathmatch game

Survivor

Survive for 3:30 in endless night mode

Precise cut

Kill 14 enemies with a single laser beam

Grenadier

Survive night 7 or higher using grenades only

Not so fast

Have 20 enemies frozen at the same time in defense mode

Arsonist

Kill 70 enemies with flamethrower in one night in defense mode

One shot, many kills

Kill 8 zombies with a single sniper rifle bullet in defense mode

Watch your steps

Survive night 9 or higher using mines only

Secret Achievement

Lumberjack

Survive night 7 or higher using chainsaw only

Demolition

Kill 8 zombies with a single rocket in defense mode

Combat mastery

Survive 10 nights without any barricades, turrets or mines

Saving up

Survive 6 nights without buying anything

Beginner

Survive for 2:00 in endless night mode

Cheap and reliable

Kill 300 zombies with shotgun in a single game in defense mode

Untouchable

Survive 10 nights without taking any damage

Major

Score 500,000 points in defense mode

Come get some

Build and equip four turrets

Efficient usage

Use no more than 6 clips during the first night

Captain

Score 250,000 points in defense mode

Lieutenant

Score 150,000 points in defense mode

Sergeant

Score 80,000 points in defense mode

Corporal

Score 30,000 points in defense mode

Private

Score 10,000 points in defense mode