Here are some great multi-player gaming sites you can actually play online with your friends.
Battle Dawn is a free multiplayer online game featuring three types of worlds with thousands of other real players. The game is built entirely in flash. it’s a free mmorpg game that requires no downloads. http://www.battledawn.com/
http://www.agame.com/games/multiplayer AGame is Your zone to play free online games.
Mini Clip Fun Factory
You can play the games below and more at Mini Clip fun factory. http://www.miniclip.com/games/genre-2/multiplayer/en/ Empire Robot Rage Rise Mythos Big Farm OurWorld Tanki Online Bullfrog Poker Wizard101 Wartune 8 Ball Pool Club Penguin Drakensang