When someone describes a game as "bio-engineered space dogs building bases while fighting alien swarms with gravity guns," it's hard not to pay attention. Gravhounds immediately stands out from the crowd thanks to its quirky premise, but after spending some time with this Xbox Game Preview release, it's clear that there's more here than just its unusual canine mascots. Developed by Octopus Panic, Gravhounds is a 1-4 player co-op action-builder that blends base construction, r