personaly i play aqw at www.aq.com it requires no dowload but is 2D have fun ;)
runescape.com you dont need to download anything for Runescape, I personally have played Runescape for about 2 years without downloading anything. Runescape requires no download, so enjoy :).
Runescape is somewhat like world of warcraft, though it is not a complex, it is free.
Nope.
It probably is : www.drkid.webs.com .
Howrse, but you dont download it.
www.clubpenguin.com
download it online but i dont recommend it its illegal
Well i dont know games like pokemon b but heres some games i know wizard101 toontown AQworlds free realms Roblox spore Club Penuin Halo 2 for pc Plants vs Zombies
theres club penguin or neopets, dragonfable, adventurequest, (dragonfable is better tho) based on your question your looking for medeival games. IJJI has a bunch of games that require download but I find fun, Soldierfront is more modern day but I quite enjoy it. Just thinking you may like it.
Runescape-The Massive Online Adventure Game
Well you dont get games on game centre, most games you download that is online is already part of game centre.
runescape it is a game with lots of skills and it is free membership if you wnat to unlock more places and more items. www.runescape.com