Corridor Digital have released a video showing a video game called "Ultimate Gun Game", one in which every famous game-based gun is included. Many guns are included, I should say - not EVERY gun. That'd be too many guns. Instead we've got just the important guns. The Portal Gun, for instance. And many of the most devastating overpowered guns from the strangest first-person shooters in the history of the genre, all included in one live-action video for your entertainment.