Review Scores
Originally the score used was the highest scoring sku, however this has caused complications and lots of fluctuation as well as in some cases not being as definitive a metascore as the most reviewed sku (Batman:AC is a good example, PS3 is 96 VS 95 on 360, but has nearly 40 reviews less) The scores now used for multiplats will be the version with the most reviews, however if the highest scoring sku is within 10 reviews of the most reviewed version, that score will be used.
Deus Ex: Human Revolution
Xbox 360 - 89 - 68 Reviews
PS3 - 89 - 49 Reviews
PC - 90 - 53 Reviews
Dead Island
Xbox 360 - 71 - 72 Reviews
PS3 - 71 - 37 Reviews
PC - 80 - 24 Reviews
Dark Souls
Xbox 360 - 89 - 61 Reviews
PS3 - 89 - 48 Reviews
Rage
Xbox 360 - 81 - 73 Reviews
PS3 - 82 - 31 Reviews
PC - 79 - 29 Reviews
Batman: Arkham City
Xbox 360 - 95 - 74 Reviews
PS3 - 96 - 35 Reviews
Battlefield 3
Xbox 360 - 84 - 41 Reviews
PS3 - 86 - 28 Reviews
PC - 90 - 41 Reviews
Just Dance 3
Xbox 360 - 70 - 22 Reviews
Wii - 75 - 10 Reviews