An unmentioned kinda out-of-the-box thing is Garry’s mod (gmod). Pretty sure there are downloadable models and/or skins for nazis, and you have a ton of tools for fucking them up in the most spectacular ways possible. There are mods for gibbing, better blood and bulletholes and stuff like that. Make Rube Goldberg machines ending in splattered nazis, strap them to rockets, build mediaeval torture devices etc. The fucking up nazi possibilities are endless!