1UP:About an hour into Aliens: Colonial Marines, it's hard to find a reason to keep playing. At least that's exactly how I felt during my solo campaign run. Xenomorphs -- the creepy, black-suited extraterrestrials from the Hollywood films -- often slipped past my dimwitted allies to attack me directly. In some instances, they visibly brushed shoulders with my teammates, as they pounced towards my avatar and took a swipe at my head. Honestly, it's a strange sight to witness at first. Can the nimble Xenos even see my allies? It's hard to tell, but one thing became clear to me at this point: I'm the only target on the field that matters, and unless I round up four buddies for a coop session, no one is coming to my rescue.