If you're looking for an alternative to Battlefield 3, Ravaged could be the ticket, and now you can find out with a newly released demo -- hit the source to grab it. Like the BF series, it's got a heavy focus on vehicles, though infantry combat looks strong, too.
The demo includes a recent update which packs in dedicated server files, an improved server browser, two modes, and a lot more.
Check the launch trailer below to get a feel for it first, if you missed it before. The game is $25 if you're curious.