Online casino games developer Rival recently launched its latest slot in Thunderbird and Slots Capital in addition to Desert Nights Casino are celebrating their premiere of the new five-reel and 50-payline title by offering to triple players’ deposits.From now until August 20, players at the sites who enter the coupon code ‘THUNDER300’ will receive a 300 percent deposit bonus, which should give them more than enough cash to try out the latest innovation from Rival.Thunderbird features an expanding wild with a double multiplier during free spins while its Super Spirit Round is moreover triggered during free spins and the first reel is always wild.“The eagle, or ‘Thunderbird’, has long been a symbol of courage, wisdom and strength for native North Americans who believed the high-flying bird to be sacred,” read a statement from Desert Nights Casino and Slots Capital.