Lukewarm Media has announced that the first piece of DLC for Primal Carnage will be free, and it's out later this month.
The DLC, "Get to the Chopper", pretty much explains itself, and as PC Gamer notes, it's a bit like Left 4 Dead.
Humans have to reach a helicopter before they're safe from the dinosaurs, and then it starts again. Dino madness, if you will.
There's no specific release date on "Get to the Chopper" yet, but you can keep up with game on the official website.