I have been personally keeping track of 360 and PS3 in game releases and this is the result of January until the end of May. I will continue to update as the year progresses. My criteria is meant to give the full picture, while being simple as well. 

- Must be a 360 game not on PS3/PS3 game not on 360.
- Must be on the 360/PS3 section on Metacritic
- Must have at least a 70 ranking on Metacritic

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360

90+ (1) - Trials Evolution
80-89 (5) - The Witcher 2, Fez, Sine Mora, Minecraft, Happy Action Theatre
70-79 (6) - Akai Katana, Alan Wake: AN, The Splatters, Anomaly: Warzone Earth, Quarrel, Haunt 

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PS3

90+ (1) - Journey
80-89 (3) - MLB 12: The Show, Closure, Jak and Daxter Collection
70-79 (7)- Twisted Metal, Starhawk, Sorcery, Atelier Meruru, Tales of Graces, Motorstorm RC, House of the Dead 4

And what is the purpose of this...?

Xbox is winning now but the battle isn't over yet!

What's the purpose of tracking game sales?

Some people might be interested, so it gets done. :)

My question was more related to the fact we get threads like these every other week. The novelty has worn out.

nope ive been seeing the threads for weeks and none have been as specific as mine. 

Plus, comparing the 2012 catalogues of the 2 biggest rivals this gen seems relevant enough to create a thread about it, if only to give an eye opener to those who may not have realized some of these games on the list exist. 

... Can't disagree on that point. :P

Have fun with it though sales2099, I'll keep track of the thread. :)

Thanks for reminding me how terrible both lineups are you jerk. W I think 360 won though, solely because I am interested in the Witcher 2.