Today developer Tripwire Interactive announced that a large update for its zombie-tastic shooter Killing Floor will arrive tomorrow, October 22. In celebration of this news, Valve’s Steam service is hosting a free weekend.

Dubbed the “Level Up” pack, this bit of DLC will add three new maps, one new monster, a new “Demolition” class, and seven new weapons including: an automatic shotgun, a healing gun, two rifles sporting grenade launchers, and proximity mines .

If this sounds like the kind of thing you’re into, you might want to start up Steam and pre-load Killing Floor. The free weekend starts Thursday and will last all weekend.

Source: Shacknews.com