Most avalanche slots remove symbols from a winning combination, then let new icons fall into the empty spaces. The grid is checked again without charging for another paid spin. A reverse avalanche changes that order. Winning symbols may stay locked while non-winning icons disappear. The movement looks backwards because the game preserves the useful part of the grid rather than clearing it first.
The name does not describe one universal rule. NetEnt’s Cash-O-Matic keeps symbols from winning combinations on the reels while the rest vanish. Relax Gaming’s Purrrminator also retains winning symbols, then introduces new symbols during another generation. Some titles animate replacement icons rising from below or expanding upwards, while others still drop new icons from above. “Reverse” refers mainly to what remains after a win.
When opening a reverse-avalanche title at SpinBara, the paytable should be read. Check which symbols are locked, which ones are removed, how new icons enter, what ends the sequence and when the full grid resets. A familiar cascade animation can hide a different settlement method, especially when only the strongest winning symbol survives into the next generation.
Cash-O-Matic provides an early example. Its official page states that symbols in a winning combination remain while all other symbols disappear. The feature gives an existing combination a chance to grow into a longer line instead of replacing the paid symbols with a fresh set. The title uses a 5×4 grid and up to 1,024 bet ways.
Suppose three matching symbols produce a win across the first three reels. In an ordinary avalanche, those symbols disappear. Under the reverse model, they can remain while empty positions are refilled. The next generation may add a fourth or fifth match, extending the original combination.
The return is not automatically larger. Incoming icons may fail to match the retained group, ending the sequence with the first payment. A standard avalanche could remove that group and create a different premium win. Reverse movement changes the route through the round; it does not guarantee improvement.
Purrrminator uses a 6×4 Connected Ways grid. Three or more matching symbols in connected positions can start its Reverse Avalanche. Relax Gaming explains that winning symbols remain locked while new symbols arrive, and the round continues until no more matching symbols land. Its free-spin mode enlarges the grid to 6×5.
Connected Ways require matching icons to touch through permitted adjacent positions, starting from the leftmost reel under this game’s rules. Locked symbols act as anchors. New symbols must connect with that group to extend the result. A matching icon elsewhere may have no value if it fails to join the required route.
The upward movement seen in some games is an animation used to show the grid being rebuilt from below. It distinguishes the mechanic from gravity-led cascades, but the direction has no separate payout value. A symbol rising into reel four is paid only if it forms a valid line, way or cluster.
Some titles add arrows or expansion instructions to incoming symbols. Purrrminator can introduce marked symbols that expand up or down on their reel. This is a separate modifier. An upward arrow may fill positions above the icon; it does not mean every replacement symbol follows the same rule.
The sequence can stop because no incoming symbol extends the retained win, the grid becomes full or a blocker occupies a needed position. Relax Gaming states that Purrrminator ends when no more matching symbols land. Cash-O-Matic follows the broad idea of rebuilding the grid around symbols already involved in a win.
One paid spin can contain the opening result and several later evaluations. The game may show a running total while every successful generation adds another amount. The original stake is not charged again for each step unless the rules describe a separate wager, feature purchase or gamble option.
Multipliers can depend on how much of the grid is filled. Cash-O-Matic awards a level multiplier when one full row contains winning symbols. Its main-game levels rise from 1x to 2x, 4x and 10x as more rows are completed. Reverse Avalanche helps those levels by retaining winners that may fill more positions later.
A fuller grid still does not guarantee a large payment. Low-value symbols can occupy many spaces, and the paytable may reward a premium four-reel combination more strongly than several longer combinations of basic icons. Symbol rank, connection length, active multiplier and stake decide the credit.
Scatter treatment also differs by title. A Scatter may remain during the sequence, be collected towards free spins or follow its own removal rule. Cash-O-Matic links collected Scatters to the number of free spins awarded. Purrrminator can award up to 20 free spins and uses a larger grid during the feature.
The grid normally resets after the paid round ends. Locked winners are not stored value and usually do not carry into the next base-game spin. Free spins may use the same reverse process, but the paytable must state which items persist. A symbol retained for one avalanche sequence should not be assumed to survive the whole bonus.
Reverse avalanches can change how a near miss looks. Two matching symbols beside a locked group may appear one position short of another extension. That gap has no partial payment. The game checks the completed arrangement against its connection rule. Movement alone earns nothing.
A useful reading method has four checks. Identify the paying system: lines, ways, clusters or connected ways. Check which symbols remain after a win. Confirm the refill direction and any expansion arrows. Find the stopping rule and reset point.
Symbols move back up the reels because the game is rebuilding empty spaces around retained winners or presenting a refill sequence from below. The reverse motion supports a rule that protects winning symbols while removing weaker ones. It can extend combinations, fill rows and activate multipliers, but every added payment still depends on the paytable and the connected layout.