Consortium is having a free weekend on Steam, and if you add it to your library it's yours to keep - right up until the heat death of the universe. Hopefully it's not much longer now.
If you're into free stuff, why not sink your teeth into the best free games on PC. Quick, before the apocalypse takes you.
Consortium is a great little game that's full of interesting ideas. It's like a shrunk-down immersive sim, and while not quite on the scale of something like Deus Ex (it's set on a plane) it manages to make your many choices feel like they actually matter. It's also impressively reactive.
So yeah, get Consortium downloaded before the end of the day and you'll get to keep it.
Who knows, you might like it enough to help fund its sequel, which launches on Kickstarter tomorrow.