No only is Secret Hitler a great game, it is also available for free under a Creative Commons License.
The rules and artwork can be downloaded so you can print and craft your own copy of the game. As the tagline goes "PRACTICE FIGHTING FASCISM FOR FREE."
http://www.secrethitler.com/
Update: This is what should happen when you release a creative work under the Creative Commons License, others can use the content to develop interesting variations; to "adapt - remix, transform, and build upon the game".
Did you hear about the "Secret Voldemort" re-skin? Information on https://www.boardgamegeek.com/filepage/150787/secret-voldemort-reskin-secret-hitler. Original art and explanations on https://thecraftyplayers.com/2017/02/22/secret-voldemort/.
Aside: No doubt the word Voldemort is trademarked so this version of the game isn't necessarily going to have a place in the authentic HP branding licensing multi-verse...
