Greentube launches Highway to Bell Stack & Collect slot

Greentube, NOVOMATIC’s Digital Gaming and Entertainment division, on 22 September 2026 announced the launch of Highway to Bell Stack & Collect™, a new online slot title released from Vienna.

The company said the game is a “Hell-Rock” themed slot with five reels and 20 win lines, built around a Bell Collect feature that activates when fireball symbols land alongside a Bell Collector. Greentube said the bell collects the values of fireball symbols over multiple tolls before awarding the accumulated total.

According to Greentube, a Mystery Bell Collect can also activate when fireball symbols land without the Bell Collector, with fireball values collected by a bell positioned outside the reels.

The Stack & Collect™ Bonus is triggered by landing three microphone symbols on reels 1, 3 and 5, Greentube said. The bonus starts with three free spins that reset when new fireball or incrementer symbols land; the company added that incrementer symbols increase visible fireball values and then convert into fireballs. Greentube also said filling a reel with fireballs prompts a bell above the reel to collect values and increase its multiplier to 3x, with each reel collectible up to three times before locking.

Richard Ganster, Director of Games Strategy and Games Portfolio Management at Greentube, said: "Highway to Bell Stack & Collect™ takes players to a rock concert in Hell, and every element of the game is built around that energy. The Bell Collect and Mystery Bell Collect keep the base game rewarding on every spin, so players always have something to watch for.

"The Stack & Collect™ Bonus is where the title really delivers. Locking in fireball values, reel by reel, and pushing toward the Grand Prize give players a clear sense of progression and a strong ceiling on win potential. It's a title that fits operators looking for a hard-rocking hit with genuine depth to its feature set."