Return to player. Try Monster Disco XtraHold slot online for free in demo mode with no download or no registration required. With a quite balanced math and the possibility. A resourceful game guide outlining rules and. . Play Monster Disco XtraHold at HelloMillions, and enjoy a high volatility slot game by Swintt. Game Type. GamesandCasino is a comprehensive online gambling guide filled to the brim with new and reputable online casinos, slot game reviews, bonus offers and much. Bodog Casino offers an inviting plus games including a fully launched division for Sports, Poker and Horses. GamesandCasino is a comprehensive online gambling guide filled to the brim with new and reputable online casinos, slot game reviews, bonus offers and much. %. Monster Disco XtraHold offers % return, High dispersion and x win potential, max win.