Transendence, a space exploration and shooter game.

Transendence

This is simple as this
Background Story :
The call of the threat-scanner wakes you out of autopilot. A lone pirate ship, a Viking-class by the looks of it, approaches at full power, its turbolaser blasting away. You thrust towards it, aiming your slam cannon at its path. As you wait for the ship to come closer, you consider how you'll loot the inevitable wreck. The Viking is sure to have some fuel, which you desperately need. And if you're lucky, maybe the turbolaser will survive intact. You will need it if you are to survive the journey to the Galactic Core. At the right moment you open up with the slam cannon. Its deep thumps echo throughout your ship, and flame flowers bloom out of the Viking's hull.

It's gameplay is pretty addictive, and could get you playing for hours.