Builders League United

Builders League United (BLU) is a subsidiary of TF Industries, which allegedly specializes in "construction operations". In reality, from behind a myriad of sub-fronts, it secretly controls half the world's governments, led by founder and CEO Blutarch Mann. Beneath the convincing exteriors of their bases of operation, computer racks, satellites, rockets, and missile installations can be found.

The other half of the world is just as secretly controlled by their rivals, RED (Reliable Excavation Demolition). Each corporation administers its half of the world with a multi-disciplined army of paper pushers. For any problem lacking an obvious bureaucratic solution, mercenaries are contracted to address the situation through a massive application of force. Conflicts between the two companies began as land disputes between their leaders and have continued for about a century to the present day.

BLU and RED share an intense rivalry, with nearly all encounters between the two quickly escalating into brutal and often fatal violence. Inter-company friendship is also strictly forbidden by contract. Despite this, the BLU Soldier and the RED Demoman at one time became fast friends after meeting each other at a projectile weapons expo. Once this was brought to the attention of the Administrator, however, she pitted them against each other in a deadly competition that promised a mysterious new item to the winner, twisting their former friendship into a bloody war.

BLU favors a more industrial style of architecture than RED. BLU's dress code, however, is rather liberal, requiring that employees adopt a blue color scheme for easy identification. This could also be for identification by Sentry Guns.