Some aspects will wear thin over time, but there's something sublimely satisfying - and addictive - about crafting a badass fleet of death-dealing doomships and using them to lay waste to all who oppose you.

If you haven't tried this one and you enjoy multiplayer FPS games, you're doing yourself a disservice. Since its launch in 2007, it's morphed into a bizarrely-addictive FPS/RPG hybrid with a full-on crafting system, random drops, unique weapon loadouts, and, of course, a wide variety of hats. Oh, and the various classes come with remarkably hilarious and distinct personalities. Try it out already.