Casino

Bonus Round

Also known as:bonus featurefeature round

Definition

A bonus round is a separate feature within a slot game, triggered by landing specific symbols, that breaks from normal spinning to offer free spins, pick-a-prize screens, or other mini-games with a shot at bigger payouts.

In Detail

Most bonus rounds fire the same way. Land a set number of scatter or bonus symbols anywhere on the reels, usually three or more, and the game breaks away from ordinary spinning into something different. A handful of games skip the wait entirely and let players buy straight into the feature for a flat multiple of their stake instead of chasing the trigger naturally. What happens next varies a lot by game. Free spins are the most common format by a wide margin, often stacked with extras like sticky wilds or a rising multiplier that makes each spin more valuable than the last. Pick-and-click screens hand the player a grid of hidden prizes to reveal one at a time. Wheel features spin for an instant prize or a ticket into another bonus, and some titles run full arcade-style mini-games on a separate screen with their own rules and visuals entirely. Multiplier-driven versions are where the payout swings hardest. Some games advertise boosts up to 1,000x the triggering bet inside the feature, well beyond anything the base game pays on its own. That gap between base game and bonus round is deliberate. Slot math is built so the feature carries a disproportionate share of the game's overall return, which is part of why hitting three scatters feels like the moment a slot actually opens up. It's the payoff the base game is designed to build toward. That also means a game's headline RTP figure, something like 96.5%, is really an average across thousands of spins that includes both the dry stretches between triggers and the outsized wins the bonus round occasionally delivers, rather than a number any single session is likely to land on exactly.

Examples

Triggering free spins off scatters

A player spinning a $1 bet lands three scatter symbols anywhere on the reels, which awards 10 free spins with a 2x multiplier applied to every win during the round. A base spin that would have paid $5 now pays $10 for the rest of the feature, without costing the player anything further.

Buying into a bonus round directly

Instead of spinning and hoping for scatters, a player uses a bonus buy option priced at 100x their $1 bet, paying $100 to enter the free spins round immediately. It skips the base game grind entirely but means the full $100 is already at risk before a single bonus spin has landed.