2. Unreal Tournament (1999)
The game that brought us 'Boom, Headshot!', yes, Unreal Tournament is our pick for the second-best first-person shooter ever. The game combined twitch fueled gun play with some of the most well-designed artificial intelligence bots created at the time (something crucial back when Internet connections ran at 56K speeds). Cannonizing much of the terminolgy that we bandy around when we speak of FPS, the game has been undeniably influential. Old dial-up modems weren't able to handle the massive Call of Duty server loads of today, so multiplayer matches were much more intimate affairs. Whether you were a well-hidden sniper or a flak cannon surgeon, UT was innovative beyond measure for the era. It was also one of the first FPS to be played comptetively at the World Cyber Games in 2001, helping usher in the age of Esports.