The Space Game

They're not messing around with the nomenclature. The Space Game is a splendid little browser-based real-time strategy. In it you have to build a grid of energy nodes, mining units, and defence towers, in order to complete the asteroid-hoovering tasks set for each mission. As the game goes on your mining grid is heading deeper and deeper into enemy territory, and the battles you have to fight to get your precious space rocks becomes even more intense. It's beautifully constructed, and rather engrossing. Go play it. (Thanks to everyone who sent us the link over the weekend.)

EDIT: Interesting point made in the comments that Harvest does something similar, better. We talked about it previously here.