King Billy Casino is offering 25% + 25 Extra Spins on Gonzo’s Quest / Rook’s Revenge on Mondays. This australian casino Free Spins is availiable at Microgaming, NetEnt, Evolution Gaming, Betsoft, Play’n GO, NextGen Gaming, iSoftBet, Yggdrasil Gaming, Rabcat, BGAMING, Ezugi, Thunderkick, Amatic Industries, Elk Studios, Endorphina, GameArt, Booming Games, Habanero, Ainsworth Gaming Technology, Pragmatic Play, Spinomenal software.