Gasworks

"There have been rumors that BLU murdered one of the most important members of RED at one of their refineries. Secretly, a chosen team of Mercenaries went to investigate a RED refinery, which is located in the Badlands land between Badwater Basin and Thunder Mountains, called Gasworks. However, the moment the team arrived they realized that they were not alone in this investigation and had no choice but to fight for their lives."

This is a remake attempt of Half-Life 1 multiplayer map, Gasworks, for a Team Fortress 2 mod, Open Fortress.