Though you can probably guess the plot of the upcoming Aliens vs. Predator game, Sega has seen fit to explain it anyway. They've released a story trailer that sets the stage.

Here's a summary of the plot: the Aliens are infesting shit, the Marines get sent in to investigate, and the Predators show up to kill both of them. I'm leaving off some details but not many. Oh, hey, Lance Hendriksen's back. He's totally not gonna die again.

Whatever, you'll like it anyway. AvP arrives on the PC, PS3, and Xbox 360 early next year.