Symbol Converter
A symbol that transforms a specific regular symbol into another type of 'special symbol', triggering a feature chain reaction.
Slot Features Explained and Standardized
Explore 228 mechanics identified through examination of individual games. We classify features by how they work, with explanations and interactive demos that make their similarities and differences easier to understand.
All FeaturesBonus GameFree SpinsJackpotScatterSpecial BettingSpecial ReelsSpecial SymbolsUnique PaysUnique SpinsWild
Symbol Group Merge & Multiplier
Adjacent cash symbols merge into a single symbol, summing their values and applying a random multiplier while freeing up grid space.
Symbol Modifier
A general term for any special symbol that has the ability to actively change or enhance the 'value' or 'state' of other symbols.
Symbol Release
A feature where specific symbols are collected during a set number of spins, then released all at once on the final spin to create a big win.
Symbol Removal
A feature that temporarily removes specific symbols (usually low-value ones) from the reels, allowing winning combinations to be formed only with higher-value symbols.
Symbol Specific Multiplier
A feature where a high multiplier is applied only to a single, designated 'target symbol' type for that spin.
Symbol Split
A feature where a single symbol in one position is treated as two (double) or more symbols, creating longer winning combinations.
Symbol Trail Wilds
A feature where a specific winning symbol leaves a wild in its 'trail' after disappearing, helping the chain reaction.
Symbol Transformation Wild
A feature where, under certain conditions, one or more types of regular symbols transform into wild symbols.
Symbol Upgrade
A feature that transforms low-value symbols into higher-value ones, progressively increasing the average payout potential of the reels.
Symbol-Driven Jackpot
A jackpot that is triggered directly by a specific symbol combination, not randomly.
Symbol-Generated Wild
A feature where a wild symbol is randomly generated in one of the empty spots left by an exploding winning cluster.
Symbol-to-Mini-Slot Transformation
This feature transforms a regular symbol on the main reels into a fully functional single-reel mini-slot machine, which then spins to award unique prizes like multipliers, free spins, or bonus game triggers.
Synchronized Reels
A mechanic where two or more separate reels are linked to land with the exact same symbols.
Timed Cash-Out Frame
A specific frame on the reels counts down with each spin, awarding the value of symbols inside it when the timer reaches zero.
Transforming Symbol
A special symbol that continuously transforms into a random paying symbol at the end of every spin.