This key is from Lootboy and as such there is a possibility that it's a duplicate; as I already have this game I'm afraid i can not guarantee its status, so please bear this in mind and consider allowing me to delete this giveaway if it's a dupe but otherwise do as you prefer.
Also bear in mind that according to SteamDB this key CANNOT be activated in Belarus or Russia. No other restrictions seem to be present.
With all that said, good luck to those who enter.