Not every single game that you think is good is a ten out of ten. The only type of game that can be ranked to a ten out of a ten, is a game that can be considered the greatest of all time. And as you can imagine, there aren't very many. Most reviews are written as an opinion. Well, me... I like to review games because of the facts layed out on the table. Here is what I think. As I said, we don't see many "Greatest of all time" games. However, there are some. The ones that there are is Halo 3, Modern Warfare 2, Mass Effect 2, and Grand Theft Auto IV. That is my opinion. But in facts, Halo 3 and Modern Warfare 2 are seriously competitors for the spot in greatest game.
MW2- despite what you spammers say, if you play with friends and have the real knowledge of the guns, this game is awesome till the end.
Borderlands- so much time spent on this it's fun alone or with friends worth your money and then some.
Guild wars- this is the game i have spent most hours on out of anything. I am Following what news they are releasing on guildwars2.com and it sounds like an 11 out of 10, it's gonna be sick, and all for no monthly pay. they are crazy indeed.
Assasin's Creed.. All of them One of my favorite games of all time. I love it, just love the story and gameplay, and now with Brotherhood coming out.. it'll be even better!
Another would probably be Super Mario Bros. Any of them. This is because of all the success it has and that it's dislikes from people are very.. I mean every low. I love almost all the Super Mario games.. only one that wasn't that good was Sunshine.
Also just because games are good do not mean they are 10 out of 10.. I'd rarely give out a perfect 10 to a game.. ever!