Even for 2D games you need a gcard.... But well, try Grandchase(
www.grandchasesea.com) and also try Phoenix Dynasty online(pdo.enjoymmo.com)
Phoenix Dynasty is 3D but its a good low spec game. If this one wont even work, try illutia (
www.illutia.com).
If none of those work u need a new computer
EDIT: First try Phoenix dynasty, then grandchase, then Illutia and then dofus(
www.dofus.com)
I play Grandchase and PDO, the other 2 I have played, so if you need help, PM me ur msn(if you have it) or just ask me if I can help you ingame