[ajkjk]

That sounds like it is itself a ripoff of the game Mafia [1] which is ubiquitous in the US. Unless it came first, I guess.

https://en.m.wikipedia.org/wiki/Mafia_(party_game)

[chris_7]

If Secret Hitler is a ripoff of anything, it's Avalon, which is similar to Mafia/Werewolf, but is much deeper and lacks the issue of player elimination.