BPM is an amazing concept, realised wonderfully. It's not the easiest of recommendations due to the game's brutal difficulty level and heavy metal skew, but if you're on board with those things, willing to learn something new (and get your ass handed to you repeatedly in the process), and prepared to overcome the whims of some random elements to bring down Nidhogg, you're in for one hell of a time. Honestly, well executed passages are next-level satisfying, from triple-tap kill combos to the beat to the simple act of reloading some of the fiddlier weapons. Completionists beware, though — the list is a bit silly.