That’s what GSC are suggesting with their Quest Contest. There are bunch of rules and stuff over on the competition page, but what it comes down to is this: “The best ideas from the contest may be implemented in the new S.T.A.L.K.E.R. game. This said, the developers retain the right to change the quest looks or implementation, while preserving the key author’s idea.” Quest authors will also get the name in the credits. They’re looking for less than a side of A4, so it’s not exactly an insurmountable challenge. Might as well have go, eh? It can’t look bad on your CV, either.
More of this sort of thing