Retriggering happens when bonus features activate again while already running. Not every game allows this. Those who do use specific mechanics make it possible. Scatter symbols landing during free spins represent the most common method. Other games use collection systems or special symbols appearing mid-feature. A retrigger feature on SQUEENVIP slot extends bonus rounds beyond initial allocations. Others theoretically allow unlimited extensions, though probability makes extreme cases rare.
Scatter symbol reappearance
Landing the same scatter combination that triggered features initially can retrigger them during bonus rounds. Three scatters launched 10 free spins. Landing three more scatters during those 10 spins adds another batch – often 10 more spins, though some games vary the amount. This scatter-for-scatter retrigger method mirrors the original trigger condition. Players recognise it immediately since they’ve already seen those symbols activate features once. Retrigger frequency depends on scatter appearance rates during bonuses. Games keeping identical scatter probabilities between base and bonus gameplay make retriggering as likely as initial triggers. Others reduce scatter frequency during bonuses, making retriggering harder than the original activation.
Dedicated retrigger symbols
Special symbols exist solely for retrigger purposes, appearing only during active features. These aren’t the original trigger symbols. They’re new icons showing up after features start. Regular gameplay uses book symbols for triggering. During free spins, separate golden book symbols appear, causing retriggering. This dual-symbol system distinguishes initial triggers from extensions. Dedicated retrigger symbols often carry different requirements than original triggers. Initial activation might need three scatters anywhere. Retriggering requires only two retrigger symbols. These modified requirements tune retrigger probability independently from initial trigger rates.
Collection-based retrigger systems
Collecting specific items during features fills meters that award additional rounds upon completion. This differs from instant symbol-based retriggering. Progress builds gradually. Collecting 10 coins during free spins grants 5 more spins. Each coin landing adds to the total. Reaching 10 triggers the extension. Collection requirements sometimes scale with each retrigger. The first collection needs 10 items. The second collection needs 15. Third needs 20. This progressive difficulty prevents endless easy retriggering. Early extensions come readily. Later extensions demand more effort. The scaling creates natural limits without hard caps.
Automatic spin additions
Some games add spins automatically under certain conditions without specific symbol requirements. Landing high-value wins during bonuses might award extra spins. Wins exceeding 50x bet amounts automatically grant 3 additional spins. This win-based retrigger rewards successful bonus rounds with extensions. Poor-performing bonuses end at initial allocations. Strong bonuses keep extending themselves. Consecutive wins sometimes trigger automatic additions. Three winning spins in a row add 2 more spins. The streak requirement ensures extensions come from sustained success rather than single lucky outcomes. Win-based automatic additions create self-reinforcing cycles where good bonuses get better through extensions.
Multiplier milestone extensions
Reaching specific multiplier levels during progressive multiplier features can trigger spin additions. Maybe multipliers climbing from 1x through 5x awards no extensions. Hitting a 6x multiplier adds 3 spins. Reaching 10x adds 5 more. These milestone-based extensions reward players reaching higher multiplier tiers with opportunities to use those elevated values across additional spins. bMilestone extensions incentivise pushing toward higher multipliers rather than being satisfied with modest levels. Without extensions, players might feel less motivated about multiplier progression.
Retrigger mechanics include scatter reappearance, dedicated retrigger symbols, collection systems, automatic spin additions, and milestone extensions, enabling feature extensions through varied triggering conditions beyond just initial activation requirements.