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Kung Fury free to watch on Steam.
Summary:
During an unfortunate series of events a friend of Kung Fury is assassinated by the most dangerous kung fu master criminal of all time; Adolf Hitler, a.k.a Kung Führer. Kung Fury decides to travel back in time, to Nazi Germany, in order to kill Hitler and end the Nazi empire once and for all.
It's literally always been available for free, on their official YouTube channel (https://www.youtube.com/watch?v=bS5P_LAqiVg). Not sure what the deal here is, unless they used to charge for this on Steam previously? Which would be weird.
In any case, I'll allow it, as the movie is dope.