Developer 
Thunder Express is a five-reel, three-row video slot from Future Gaming Solutions with a classic fruit-machine format and a railway storm theme. The game uses five paylines, with wins paid from left to right. Symbols include bells, lemons, oranges, plums, cherries, watermelons, BARs and a red 7, which acts as the Wild and substitutes for regular symbols.
The main feature is the Running Wins Bonus Game, a locked-symbol respin round that starts when at least four Bonus symbols land together with a Super Bonus symbol. Bonus symbols carry cash values, while the Super Bonus symbol, shown as a steam locomotive, collects those values on the middle reel. The game also shows four jackpot tiers: Mini, Minor, Major and Grand.
A Lucky Riches feature can add bonus symbols in the base game, while Running Spins increases the chance of triggering the bonus round. Players can use the demo version to play for free and practice before playing for real money. The paytable lists an RTP of 96.15%.
