P.U.R.E. Free Full Game RC2

Purify, Unite, Reclaim, Exterminate
Developed by WolfeGames, P.U.R.E. is a large-scale Real Time Strategy game, built using the Spring Engine. P.U.R.E. is set in a world where Humanity is attempting to wrest their devastated civilization from the evil AI known as the Overmind. Visit the official website for details - a trailer can be found here.