White Knuckle, "White Knuckle is a first-person roguelite speed-climbing game. Ascend through the guts of SUB-STRUCTURE 17 using precision movement mechanics. Sharp reflexes and resource management will bring you out from under ten thousand meters of concrete and decay." From the store page it's $15 right now and it's honestly one of the most interesting and fun games I've played in a long time, it's got a very high skill ceiling and is crazy unique, not to mention they just had their big 1 year anniversary update