Greetings gamers! 
A game called Infinifactory is free to own forever.
As long as you grab it before 16:00 UTC on the 1st February.
Infinifactory is a sandbox puzzle game by Zachtronics, the creators of SpaceChem and Infiniminer. Build factories that assemble products for your alien overlords, and try not to die in the process.
Have infini-fun! 