Multiplayer either makes a good game great by adding challenge beyond the limitations of AI opponants and replayability, neither adds anything nor subtracts anything or takes over the game completely, none of which are harmful particularly. Generally when multiplayer is the prime focus people buying that game will be aware of that and won't be buying it solely for the single player campaign. On the other hand a game with a strong single player campaign might lack any replay value, FPS games especially have next to no replay value most of the time, and that's a problem because it means your game will be overshadowed by others that have theoretically endless replay value.DaHero said:Now, that's MY opinion, so the discussion is open for intelligent minds. (note: I don't expect anyone to think like me, and I don't believe my opinion is the "right one" I'm just giving my opinion to start the discussion)
Some games and even entire genres revolve entirely around multiplayer, the FPS giants, the whole RTS and fighting game genres, games such as LittleBigPlanet that rely heavily on user-generated content all wouldn't exist without multiplayer. Saying it hurts games as a whole just because you don't like the community is a little narrow minded to say the least.