For the next four days, Behaviour Digital's Dead By Daylight is free on Steam. All that's required is to download, install and play. If you end up liking the game -- and judging by 65,000+ Mostly Positive reviews, you will -- you can score a copy at half off for $10 for the base edition or $15 for the Deluxe Edition that contains the digital versions of the soundtrack, art book and two masks for Payday 2.
Dead by Daylight is a multiplayer (4vs1) horror game where one player takes on the role of the savage Killer, and the other four players play as Survivors, trying to escape the Killer and avoid being caught, tortured and killed.
Survivors play in third-person and have the advantage of better situational awareness. The Killer plays in first-person and is more focused on their prey.
The Survivors' goal in each encounter is to escape the Killing Ground without getting caught by the Killer - something that sounds easier than it is, especially when the environment changes every time you play.
Check out the link above for the free-play days or head to the Dead By Daylight site.