Massive Multiplayer Strategy Game Does Any One Knows Of A Massive Multiplayer Online Game In Which We Could Interact With Other Players & Free..?

Does any one knows of a Massive Multiplayer Online game in which we could interact with other players & free..? - massive multiplayer strategy game

This online game that the following conditions are met ...
"It is free to register and play.
Requirements of low quality (with few or no graphics, and RAM)
more labor-mental (if not the best strategy, but OK, even if it is)
Adjustment.
requires no download.
can be played anywhere by anyone.

Please tell me about these games or the like, if I am tired of searching.