http://www.actiontrip.com/#top-s
Pffff... The Sims 2 Expansion Pack? It wasnt even really all that good. I would of expected Half Life 2 to be number one.
(sigh).... HL2 didnt get enough advertising. Actually, I dont think it even got ANY advertising. Plus, probably only like 1/4 of American kids played Half Life or even know about Half Life 2.