10. Subway and Counter-Strike: Source
A few years ago, unauthorized Subway ads began appearing in various parts of Counter-Strike: Source. Valve was understandably up in arms about the entire ordeal, but why did Engage Advertisement think Subway was the best option for in-game advertisements?
Just because there's a subway map, that doesn't always mean players want sandwiches. Although, if you're making sandwiches, go ahead and give us one. We'll take it.