Bullion Xpress is a slot by Play’n GO featuring a classic 6-reel layout with fixed paylines. Wins are paid from left to right when matching symbols land on active lines. The gameplay is built around standard spins and the Bonus Blitz feature. Wild symbols substitute for regular icons to help form winning combinations, while Scatter symbols trigger a respin-based bonus round. During Bonus Blitz, a train appears above the reels and cash symbols with fixed values lock onto the grid. New symbols may be added during respins, gradually increasing the total win. The bonus continues as long as new values appear on the field. The slot focuses on bonus-driven gameplay with value collection and does not include free spins.