Outflow is a map designed for Team Fortress 2's Attack/Defend mode, where one team attempts to capture a series of control points while the other team tries to stop them. Outflow is based on the map 'Steel', where the final point is always available for capture, and capturing other points extends the round time and provides other advantages to the attacking team. Outflow is different from most Steel-like maps, in that it only has three control points, as opposed to the standard of five.
While I helped with the layout for Outflow, my primary responsibility was the artpass. The map was originally created by Lauren 'Yrrzy' Godfrey, with Joel 'Zythe_' Morscher joining the project later in development to finish the layout.