Play Samurai Katsumi slot demo and read our review. This casino game by iSoftBet is offered without registration to play for fun! Slot Moments: Samurai Mega Feature Yields Jackpot for TheBigPayback · Coin boost feature, which pay credits (starting at 2x your bet) but can be boosted. . Unique to the Samurai Spin game is a wheel feature, which can be activated before every other feature and award credit prizes, extra free.