Here's a few reasons why Edge can be safely ignored, despite the irritating fact that they're one of the most influential games magazines in Britain:
Bioshock: 8/10
Half-Life 2: 8/10 (Seriously.)
Halo 3: 10/10
Edge, for whatever reason, have always had and always will have a huge stiffy for Halo. Halo 3's a really, really good multiplayer game but the fact that they've just taken an existing experience and then tweaked it to perfection does not count as innovation. It's almost like saying that someone that's really, really good at making Pizzas deserves a Chef Of The Year award.
Halo 3 doesn't really innovate where it counts most: gameplay. It is, essentially, a perfected version of a game that's been around since 2005. Whilst it's not a bad thing, (I love Halo's multiplayer,) it doesn't do anything fundamentally interesting with it's gameplay. THAT'S where true innovation is. In my opinion, Bioshock deserves the innovation award for crafting one of the most intelligent and thought-provoking places in any media: Rapture.
Just ask yourself, what's really more important? Thought-provoking, emotionally engaging themes and development of games as a medium of expression? Or a thoroughly smooth, well integrated multiplayer experience?