Today, the video game market is an extremely diverse place when it comes to genre. Third-person action/adventures, stealth games, RPGs, JRPGs, shoot 'em-ups, brawlers, fighting games, racing games, and so much more are all available within the press of a few buttons. However, there's one genre of video games that owes much of its success to one development studio in particular: First-person shooters, and id Software.