Somebody explain to me how a facebook games company passes a game corporation. A very popular game corporation.
Zynga is more of a "game corporation" than Valve is
Let's remember that this is a developer showdown, and Zynga does develop games - albeit casual games.
Next year I hope they run two separate competitions, one for free games (Zynga, Bay 12 Games, and big flash game developers like Armor Games) and one for games you have to pay for. This would not only even some things out since free games can more easily get huge audiences but it would bring a lot of these other popular developers some time in the limelight. I don't play Dwarf Fortress myself but I'm sure the DF fans would love to see Bay 12 Games in a competition like this. Sure they'd likely loose to the heavyweights like Zynga but then Bethesda will always have considerable difficulty against an MMO developer: the online component really does make advertising easier if the developer takes advantage of it (some do, some don't).