Rusted Warfare, the indie RTS game i've mentioned a few times is currently on sale for super cheap, don't miss out!
The sale is currently on the Chrono.gg website for the next ~19 hours, with the sale it's 50% off at £2.50. Honestly, that's a crazy deal you should seriously consider. Buying from there will give you a Steam key.
The game is great! While the graphics might not be to everyone's tastes, the gameplay certainly is fun. It has features found in games like Total Annihilation and Supreme Commander, which is damn cool. Rusted Warfare has single-player missions, skirmish battles, an endless survival mode and online play.
Could easily be a game to fill some gaps in your busy schedules.