Mummelmann on 02 January 2011
Not too surprising, MS likes to keep things closed and under full control while Valve have basically lived off of offering engines and online distribution to other developers for quite some time now.
To whomever said something like "but there are so many indie games on x-box live"; yes there are (and a lot of them are damn good too), that does not mean that they were easy to put there or that the developers were treated fairly. The NES had tons of games but Nintendo were notorious for being hard to work with for 3rd parties.
