Nebulous

Nebulous is a really unique online RPG. There are no castles or kingdoms to defend, just you and your blob. Collect food dots in the game field or eat up smaller players in your path. Avoid black holes and join clans to help everyone get as big as possible. This is a fun game for anyone since there isn't really any violence in it.

There are many play modes that keep the game fresh for everyone. There is free for all, timed and untimed, capture the flag mode and even a soccer mode. The controls are easy to use. Unfortunately for multiplayer modes you'll need a 3G or wifi connection to connect to other players.