Team Fortress 2 is Valve's class based shooter released in 2007, and the Engineer is its Texan builder who constructs sentries, dispensers and teleporters for his team. His shout references the Battle of the Alamo in 1836, a rallying cry that became shorthand in American culture for a defiant last stand. The line fits the character's roots and accent perfectly, which is why fans clipped it from the game files and shared it on soundboards and in edits long after launch.