Step into the gritty, rain-slicked streets of a bygone era, where shadows stretch long and the hum of a lurking getaway car fills the air. 'The Great Stick-Up' plunges you into a suspenseful crime saga, a world of fedoras, trench coats, and the glint of ambition in the eyes of a hardened crew. The atmosphere is thick with a noir aesthetic, featuring dimly lit brick buildings, flickering neon signs, and the sound of distant sirens that add to the palpable tension of an impending robbery. Every detail, from the stylised character symbols representing the cunning gang members to the sharp, jazz-infused soundtrack, meticulously crafts a narrative of high-stakes crime and daring escapes, inviting players to become an integral part of this cinematic underworld operation. The master plan unfolds within the Free Spins round, triggered by landing three or more scatter symbols, where the true genius of the stick-up becomes apparent. As the reels spin, enigmatic Mystery Symbols land, and when they do, they expand to fill their entire reel, revealing matching premium symbols that guarantee explosive winning combinations. The strategic brilliance intensifies with the progressive upgrade system: for every two overlay symbols collected, a low-value symbol transforms into a high-value one, increasing the potency of subsequent mystery symbol reveals. This escalating tension ensures that every spin within the bonus round holds the promise of immense rewards, as the crew executes their audacious plan to perfection, transforming ordinary loot into legendary fortunes up to 10,000 times the initial stake, solidifying their place in the annals of criminal history.