Epic Games is offering Nuclear Throne for Windows and Ruiner for Windows for FREE (regularly $11.99/$19.99) for a limited time.
Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter.
RUINER is a brutal action shooter set in the year 2091 in the cyber metropolis Rengkok. A wired psychopath lashes out against a corrupt system to uncover the truth and retrieve his kidnapped brother under the guidance of a secretive hacker friend.