It would be a sub-genre that wouldn't be needed. Besides, multi-player games require much knowledge and a lot of time to develop meaning independent games are rare.
No it wouldnt there are a lot of good multiplayer games and a lot of non-multiplayer ones.SCMega RuneScape is made with java and has no place here because this is a flash game website.
I'm cleaning this up by saying this: Multiplayer = Servers
To use a server requires a lot of computers doing the same task and a lot of money to do so. I don't think that game creators would want to invest so much time and money to create a multiplayer game for free. The best they've done was just create a highscore table, but people just hack and post their 1B score on there. If they wanted to, that'd be great, but that would also in turn be terrible for AG, since users would have to sign up directly from AG, which would make AG much, much slower, because of it.
There is a multiplayer tag. There is a tag for everything, not all of them are listed on the homepage. The multiplayer tags only have games that you can play with the person sitting next to you.
hmm a flash multiplayer game huh? sounds cool however all we need is some1 to make it... idk , it sounds impossible but then again nothing is impossible...or so ive been told 0.o