In my opinion the only exclusives which require answers are the ones which define their respective genres. Its a catch 22 because genre defining games cannot be answered easily by other games as they rise above almost every game. You can tell a genre defining game because it doesn't matter when its released, the market will respond to it and it will sell. It also doesn't matter what other games are released the same day, week, month, or even holiday season because the genre defining game will sell. It must also sell enough copies to warrant enough interest in someone copying so over 2M is usually the mark I use.
So whats the difference between a genre defining exclusive game and a regular exclusive? A genre defining game sells comparably with the big selling games in its genre or its the highest selling game. Im talking market impact rather than any subjective notion that one game is 'better' than another. If say for instance hack n slash games rarely sell over 2M and the game tops the genre at 3M its a genre defining game. However if say an exclusive shooter sells 2M copies and other shooters sell over 5M copies its not genre defining. You cannot have multi-plat games selling significantly more than an exclusive and call it genre defining, because you could easily say that someone deprived of that exclusive would have the chance to get a more popular alternative.
Genre defining exclusives from Sony
- Gran Turismo 5 (Top of racing, defines popular race car games)
- God of War (Top level hack n slash, but we'll see if its still the case next year)
- Metal Gear Solid 4 (Top level action stealth, defines the genre)
Not Genre defining or not important exclusives from Sony
- Uncharted: (Will probably be with U2 though)
- Heavenly Sword: Didn't sell enough to get a sequel.
- Little Big Planet: Mario is king, yes?
- Motorstorm: Heavily bundled and sales of the sequel are poor
- RFOM: Doesn't really rise above the multiplat COD, also sales are too low.
- Infamous: Not enough sales, GTA IV is king here.
- Valkyria Chronicles: Not enough sales to care about it
- Killzone 2: Sales are too low, too slow and nothing compared to COD IV
- etc
Genre defining exclusives from Microsoft
- Halo 3/ODST/Reach: 10M+ sales, hangs with COD IV or even beats it depending on perspective.
- Gears 1/2: 5M+ sales, defines the 3rd person shooter genre can hang with COD.
- Fable 2: About the best selling WRPG this generation, released a week apart from the fantastic Fallout 3 and still sold well.
Not Genre defining or not important exclusives from Microsoft
- Forza: Though with the new Forza 3 it may become one.
- Mass Effect: Flawed masterpiece, may also with the new one
- Alan Wake: May not sell enough copies
- Crackdown: Didn't sell enough though Crackdown 2 might
- Left 4 Dead: The other series have a bigger footprint. May break out this year though
- etc I think you get where im coming from.