Diehard Team Fortress 2 fans have spent all weekend sleuthing out Friday's tease, in which a "Gray Mann" is revealed to be the brother of Redmond and Blutarch Mann, owners of the game's RED and BLU teams. Tons of evidence suggest this is going to mean the introduction of a robot faction, which Valve itself all but… » 8/12/12 9:30am 8/12/12 9:30am