Not sure how many gamedevs are Metalheads (we’re a rare bunch), but guy is purely a drummer. All the Guitars are programmed and/or recorded in teeny tiny segments. Impressive stuff.
No vocals too, incase that’s why people can’t listen to Metal 
Ghost is my fave.
https://.com/watch?v=8WvRGUiRGoo
https://.com/watch?v=V1OBJm3dcdQ