Microsoft's ID@Xbox showcase is a staple of GDC, packing a ton of independent video games into a single room and letting players go wild. This year, ID@Xbox featured 20 games across a range of genres, from shoot-em-ups and RPGs to first-person cyberpunk horror. It's impossible to play every game, so we picked four at random: Full Metal Furies, Observer, Moonlighter and Ruiner. And we had a blast.