Is this off topic? Ahhh, dunno. Anyway:
http://www.3dactionplanet.com/serioussam/sprint/
Experience speedrunning action on Serious Sam First or Second Encounter, prove you're the best, beat the rest.
(Hmmm, ugh-zan does look a bit like a cyberdemon. Sorry if this was a bit too adverty, won't do it again )