A bonus game is a separate mode inside a slot with its own rules: a mini-slot, a pick among objects, a wheel, a board game. A special symbol or combination launches it, and the logic differs from the main spins. We use the tag in the catalogue for anything that goes beyond ordinary free spins.
The clearest example is BGaming’s Wild Cash x9990 (31 August 2022). On the outside it is a fruit machine from another century, three rows and ten lines, but at its centre sits a bonus with a reel of digits that multiplies the bet from 5 to 999 times, and with four or five bonus symbols extra 3x and 10x multipliers stack on top. Its card shows 96.1% RTP, a 10,490x cap and very high volatility. In NetEnt’s Spiñata Grande (23 March 2015) the Colossal Bonus turns into a mini-slot with coins and a route to free spins, with 96.84% RTP, a 500x cap and 25% winning spins.
When the bonus has several branches
NetEnt’s Wild Wild West: The Great Train Heist (23 February 2017) has two: a pick among three symbols and free spins where a wheel decides which kind of Wild you get. Its cap is 500x with a 22% hit frequency. Play’n GO’s Dawn of Egypt (20 February 2020) combines a wheel that picks the free spin count with separate Pyramid Spins, 96.23% RTP and a 5,000x cap, and offers no bonus buy.
In Red Tiger’s Narcos Mexico (24 March 2022) four bosses fight over territory in the bonus, with 95.70% RTP and a 10,486x cap. Relax Gaming’s Dead Rider’s Trail (24 August 2022) hides a board game in its bonus on a 6×6 grid of 46,656 ways, with 95.50% RTP, a 50,000x cap and entry that can be bought in three ways.
Sometimes the bonus is the entire game. Relax Gaming’s Money Cart 3 (12 April 2023) has no paylines or paying symbols: the reels fill only with bonus symbols, and the result is the sum of the numbers on the field. PG Soft’s Fortune Rabbit (11 January 2023) keeps ten positions on screen and one random bonus of eight spins, with 96.75% RTP and a 5,000x cap.
In terms of rhythm the lesson is simple: the more of the win is hidden in the bonus, the longer the quiet between those spins and the more it pays to size the bankroll beforehand. Our explainer on free spins dissects the round that follows a bonus trigger.