Seems like the original game is now a "multiplayer version" which is just the old version (Like mafia/werewolves/deceit game) made like a dlc and the new version of the game (which now is the game itself) it's more PvE oriented just like an XCOM, anyway, try looking by the name "I Am Not A Monster - Multiplayer Version" cause I don't know if the key will give both, the game or just the multiplayer dlc, to avoid any possible trouble.

Hope it helps and thanks for the chance! :D

Thank you very much, muchas gracias Bong! <3

Thanks!

Thank you very much !