this site has links to free games that don't require purchases, also has links to good sites for free games, and flash games!

Urban Dead

www.urbandead.com
this mmorpg is not real time

this mmorpg simulates a zombie apocalipse! are you a zombie? a human? going to be a zombie?
no download required
all you need to create a file are a username and password! and its right on the homepage!

Runescape

widely known, slightly complicated mmorpg
you can find it here

Adventure Quest series

adventure quest battleon.com
warpforce(adventure quest add-on) battleon.com/warpforce
mech quest mechquest.com
their first multiplayer(still in the making)-adventure quest worlds aqworlds.com
dragon fable dragonfable.com

Dead Frontier


deadfrontier.com
This amazing mmorpg is a real-time, multiplayer zombie apoctalyptic game,
it is still in production, but is available to play for free with no download!

Plantetstorm

planetstorm.com
This mmo is a trading card game, you can follow the story and get cards, level up and get cards, or fight other players!

this site has links to free games that don't require purchases, also has links to good sites for free games, and flash games!