1. Gears of War
2. Mass Effect
3. Halo 3 (for a marquee game it looks so very meh, but plays well)
Crackdown is an honorable mention, I had a lot of fun with at game.
Bethesda's Todd Howard "if install base really mattered, we'd all make board games, because there are a lot of tables."
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PSN ID - jedson328
XBL Gamertag - jedson328