Team Fortress 2 is a multiplayer first person shooter, released in 2007 and developed by Valve. The original Team Fortress was a Quake multiplayer mod created by Robin Walker before soon gaining the attention of Valve, whom eventually produced Team Fortress Classic.
TF2 was originally announced 1998 as a sequel to the original Team Fortress mod for Quake, but went through a development hell period. In 1999, the game appeared to be abandoning the art styles of the original Team Fortress Classic by moving toward a more realistic and militaristic style of gameplay, which looked more like Counter-Strike. However, the design continued evolving over the game's nine-year development period and game engine switch. At last, the final rendition of Team Fortress 2 resembles that of the original Team Fortress and Team Fortress Classic games, and also features a cartoon-like visual style.
TF2 is also one of the major reasons why both Jerma985 and STAR_ have gotten as far as they did. Early on in their YouTube career, TF2 served as the main theme of both channels and they both partnered up annually to make videos alongside one another, such as Jerma Is Mad.