Positech Planetary Defense

Planetary Defense is an arcade/strategy space game for Windows. Specially designed to be download-friendly, the Games fully functional demo weighs in at just 3MB! Despite its tiny install size, Planetary Defense offers you bags of gameplay, with simple levels defending a small world against streams of rockets, right up to complex levels with multiple moons, defensive shields, evacuating cities and a wide variety of attacking aliens including multiple-warhead scatterpacks, Cloaked cruisers and laser equipped point defence satellites.