demo mafia mayhemMayhem RTP and variance. Mayhem has an RTP of 95.75 per cent and its variance is medium to hh. The RTP is slhtly below average for on slots. How to play Mayhem. Set your bet by calling up the betting options. Click onGame Rules. Mafia Mayhem is a 6-reel video slot (3 rows on reels 1 and 2, 4 rows on reels 3, 4, 5 and 6) with sticky Wild symbols that can turn into multiplier symbols. The game has a base