Fortress Forever

Fortress Forever, contrary to popular belief, is not a remake. Fortress Forever is a continuation of Team Fortress Classic's legacy of extreme skill based multiplayer shooting action with many class changes and new game modes,

At the time of its creation, Team Fortress 2 was considered vapor ware. The fans took it upon themselves to continue Team Fortress Classic and make it the way the most hardcore of fans wanted it.

Blood Sport: Seemingly FF's in-universe explanation for the conflict, according to their Dustbowl video.