Sentinel: SciFi Space Shooter

Intense Sci-fi space combat game, survive incoming alien and pirate assaults while building up a powerful ship with epic weapons. You have been banished to the out-rim to defend mining tankers from pirate raids when a sudden invasion by an alien race destroys the worm hole portal and brings havoc to system. You must build your ship into a powerful weapon, collecting the artefacts scattered about space to build dominating weapons and repair the portal.