Bier Haus Slot by Light & Wonder

Before any spin, every reel on the 5x4 grid sits pre-loaded with runs of identical icons stacked top to bottom. So a single spin can land a whole column of beer steins, a whole column of mustachioed bartenders, or, when the dirndl-clad Bier Maiden clumps across multiple reels at once, the full-screen Maiden moment that made this WMS port famous in arcades long before it reached browsers. The 40 fixed paylines mean any of those stacks can hit from the leftmost reel rightward and pay across every row at once.

The reels sit inside a wooden Bavarian beer-hall window arch, with stone-cellar masonry on either side and a deep tavern-green felt behind the symbols. The premiums lean hard into the Oktoberfest celebration setup: the blonde Bier Maiden up top, the bartender, a wooden "Prost!" tankard sign, a hilltop Bavarian castle, foaming steins, an accordion, autumn acorns. Card-suit gems in heart, diamond, spade and club shapes fill the low end. Stein-gold highlights and warm brown borders keep the whole thing feeling like a cellar tavern at dusk.

The Wild substitutes for everything except the Feature and Gold Feature scatters. The trigger for the bonus is the odd part. You need five or more Feature or Gold Feature symbols on adjacent reels starting from the leftmost, not just any five scatters scattered anywhere. Five gives you 5 free spins. Every extra Feature beyond five adds another 5, up to an initial 80.

This is where the persisting wilds kick in. Each Gold Feature that participated in the trigger locks to its reel position and stays there for the entire bonus, so a Gold-heavy trigger can leave you with multiple stuck wilds painting the board every spin. If another Feature or Gold lands directly behind one of those stuck wilds, it converts to a Wild Feature for that single spin, a true wild that substitutes even for the scatters, and retriggers add more spins to the running counter.