Slot features

The mechanics on modern video slots beyond simple spin-and-match. Provider innovation over the last decade has produced a rich vocabulary:

• Free spins bonus: N spins triggered by scatters, often with multipliers
• Sticky wilds: wilds that stay in place for multiple spins
• Expanding wilds: wilds that fill an entire reel
• Cascading reels (avalanche/tumble): winning symbols disappear, new ones fall in, chain wins possible
• Mystery symbols: symbols that reveal identity at end of spin
• Multiplier wilds: wilds that multiply the win they participate in
• Buy feature (bonus buy): pay a multiple of your bet to skip to the bonus round
• Megaways: variable ways-to-win engine, 117,649 max
• Cluster pays: wins based on groups of 5+ connected symbols instead of paylines
• Hold-and-win / Money Respin: cash symbols get locked, respins fill remaining reels
• Random modifiers: base-game random events (wilds sprayed on, multiplier applied, extra reels)
• Progressive jackpot integration: mystery jackpots that can trigger anywhere in the base game

Slot RTP is heavily concentrated in these features. Base game runs at 92-94% RTP for many titles; the bonus feature might run at 300-500% RTP. Triggering a feature is where the RTP “arrives”.

See our buy feature glossary entry and the Megaways entry.