Shattered Galaxies 

A free game created by the company Nexon, that consists of buying robotic or organic units and sending them into battle.

Battles consist of rival factions that are determined by the planet a player is on.

Experience is gained through battling and advancement through ranks is also possible through this method.

Shattered Galaxies is a decent for a free game. However, it gets old really fast

Shattered Galaxies by Nexon March 11, 2004