Find a Firefly pendant

Kill 70 enemies with flamethrower in one night in defense mode

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

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

Survive 10 nights without any barricades, turrets or mines

Have 20 enemies frozen at the same time in defense mode

Survive night 7 or higher using grenades only

Survive 6 nights without buying anything

Survive for 3:30 in endless night mode

Kill a reaper

Score 500,000 points in defense mode

Score 250,000 points in defense mode