We live in a world where one of the best survival horror games of all-time is given away for free!
Humble Bundle are offering the Amnesia Collection for free while supplies last! That collection normally costs $34.99 and includes the following games:
Amnesia: A Machine for Pigs
Amnesia: The Dark Descent
Both of those games is compatible with the Windows, Mac and Linux operating systems. Specific requirements are listed on that website. A free Steam account is required for activation and play.