Love the portals
Anyways I give it a 9.8
Pros: Amazing sequel to an amazing game, co-op is hella fun (especially with a buddy), the humor is fantastic and it has a great story, graphics look great and puzzles have a good balance between fun and challenging.
Negatives: It's has a slightly steep price for how much content it has (but with the free extra content that will be not such a big deal)