Murder Miners, a top-rated indie FPS, goes free for a week on Failmid.com. It is rated Very Positive (82% positive reviews) on Steam.
Runs on Windows, Mac OS X, Linux, SteamOS.
If there are no more keys then return when the timer runs out, usually on the hour, when keys will be restocked.
Description
The #1 rated Xbox Live Indie Game. Halo-inspired. Compete in classic Deathmatch & CTF or be the zombie in Infection & devour corpses to level up. Vehicles. Destructible & constructible environments. Zombie survival. Hookshots. We host a playdate every Wednesday, come join us!
Looks like I already have this in my steam library.