Futuristic War Windows, Mac, Linux game

Game it is a RTS happening in distant future 2400 year. It is possible to produce builders and soldiers. Player can build new buildings (Base, Reactor, Barracks). In game there are four types of material: Energy (produced by power generators), Metal (can be mined from piles), Crystal (is used as main computer's cores), Gaz (is fuel source, each unit needs some to start power reaction inside). There will be three races Humans (Terrans) and alien race (like those from alien movie). And finaly Prima low tech civilization but can build and expand faster than other races. Each side will have its unique skills. Terann builder will build bulding from outside when alien will be conumed durning proces...