http://en.wikipedia.org/wiki/Blender_game_engine :spin::spin::spin:
Just read through it and I have to say, no wonder 
Really needs a lot of work to be resuced, I’d say.
If I knew enough about it, I’d write now but my knowledge is about as shallow as this article xD
Btw: why are there two articles?
I agree with Kram. That article /is/ written like an ad and it’s not a good article. No matter what Wikipedia guidelines say about it, all the BGE-related information is probably better off if included into the Blender article (which needs some help too, imho).
Remember, having an article on Wikipedia is not a medal of honour. On Wikipedia, information should be found where readers will be looking for it.