The classic Total Annihilation RTS recently made its way on to Impulse with a great reception from fans of the popular strategy game originally created by Cavedog Entertainment. The setting of the game is about a future galaxy torn apart by war, and was the first RTS to bring 3D units and terrain.
Fans can re-explore the fun - even on modern operating systems, and this update includes the Battle Tactics expansion. If you already own TA on Impulse, this is a free update via the Impulse client.
More info can be found at the Total Annihilation site.