Vega Strike

Vega Strike is a free 3D space simulator game. It allows players to explore a vastly dynamic universe where frontiers collide and you're just a pilot trying to make ends meet, it lets the player make their own decisions, trading, exploring and plenty of shooting action. Money allows the player to buy upgrades and better vehicles and advance into more dangerous and profitable missions. You can buy and sell cargo, accept missions from the Mission Computer and talk to residents of planets.

download: http://prdownloads.sourceforge.net/vegastrike/vegastrike-0.4.3.exe?download