Developer: Crazy Viking Studios
You will die. A lot. Enter the world of Volgarr The Viking with that knowledge and accept it. This is a game built from the ground up to deliver old-school hard-as-nails challenge and it does not disappoint. The retro games that inspired Volgarr may be before my time, but as a fan of Dark Souls and brutal platformers, I feel right at home
Steam or directly from the developer (for a DRM-free copy and a Steam key) for $11.99.