Memorial Day sale this weekend has Sins of a Solar Empire at the heavenly price of $4. Go buy it now -- full stop. Whatever nit-picky issues the 4X strategy title may have can be thrown out an airlock at that price point. It may lack a single-player campaign to teach the ropes of glorious galactic armada warfare, but setting up a medium-sized map using normal AI is a good place to start. Which reminds us: Gratuitous Space Battles is also on sale.
Impulse also has a more mainstream space opera experience on sale with the first two chapters in the Mass Effect saga bundled for $42. Want something not involving spaceships? There's a Dragon Age: Origins bundle, which includes the original game and Awakening, for $48 -- that'll definitely keep you busy all weekend. Check out the rest of the Impulse weekend sales after the break.