R. Franco Digital, the Spanish gaming provider, has launched its new slot Book of Beer, where expanding symbols fill glasses to the brim.

Immersing players in a bustling German tavern, a 5x3 grid is adorned with traditional Bavarian symbols including accordions, pretzels, pints of beer and feather hats.

Menu symbols work both as wilds to help form win lines and as scatters, with three or more granting access to the bonus round where ten free spins are awarded.

Before the free spins, one icon is chosen as the expanding symbol. Each time it appears during the bonus, the taps pour a beer, and it spreads across the entire reel, creating massive win potential.

In relevant jurisdictions, players can purchase direct access to the free spins, for a price of 100x the base bet.

Javier Sacristán Franco, International Business Director of R. Franco Digital, said: “Bringing one of the world’s biggest festivals to the world of iGaming, Book of Beer pours players a frothy pint full of expanding wilds and big win potential.

“Our latest in-house brew is perfectly timed for the upcoming Oktoberfest, and we expect a great reaction as players celebrate the tradition.”