Gratuitous Space Battles Released and Demo

A massively-singleplayer hybrid of RTS and tower defense
Positech Games has announced the release of Gratuitous Space Battles, a strategic space combat game where you design spaceships from modular components, assemble space fleets to do battle against your enemies, then observe just how well or how badly your fleet performs against a host of enemy fleets. Visit the official website for details - a playable demo is now locally mirrored.