Star Sector. It's like a space combat mount and blade warband. I put together a little high tech bounty hunter fleet with money made from raiding fascist Syndrian Diktat space stations and hitting their trade convoys en route through hyper space. The ship customization is so insanely addictive. So many weapons, hulls, fighters/bombers, missiles, lasers, and unique ship abilities. And the AI is actually kinda impressive in battle. I have a little swarm of high tech frigates with this zappy emp ability that will disable engines and weapons if it hits an unshielded target. They swarm and disable much larger and powerful ships until my main fleet arrives and unleashes a constant barrage of beam weaponry to finish them off. Addicted.