Mystery Joker is a 3-reel video slot game with 5 fixed paylines. The number of paylines cannot be changed.Mystery Joker includes a free spin scatter symbol (Joker hat).Three joker hat symbols appearing on the reels trigger the free spin feature. A sequence of free spins commences. During free spins a mystery prize is won when getting two or three joker hat symbols anywhere on the reels. If three joker hat symbols appear you are awarded additional free spins.Bets are selected using the bet buttons. Click the plus and minus buttons to change the bet one step at a time. To start the round, click SPIN. When the reels stop, the symbols displayed determine your prize according to the paytable.