I rate a game by the experience it gives me. I don't care too much about multiplayer for example, so it a game has a great multiplayer mode but a lousy single-player mode, the chances are that my score is lower. If a game has good single-player but bad multiplayer, I don't really mind and I'll probably give it a good score. If we're talking about several modes that I generally but but one of them is lousy, it's a bit trickier though. It depends on how I experience the game. If it feels like a complete experience and I don't get disappointed at the other mode(s), I'll probably give the game a good score. But in general, I rate games as experiences, not products, so in that regard I don't necessarily care if a game has some bad modes as long as it has something good for me.
That said, I don't generally score games very often.







