Combine - Competitive Turbine It's competitive Turbine, thus, Combine. If professional Viaduct can be called Product, then maybe this pun is acceptable. While playing Valve's Competitive Mode, I have suffered through more rounds of Turbine than I'm proud to admit. The design of the map is restrictive, in the way only an 11-year-old map can be. So I've recreated Turbine from scratch, keeping the basic layout, (but admittedly, not much else) with modern TF2 map design theory in mind.