PopRocks

PopRocks runs the same idea AvatarUX calls PopWins, though here it's paired with two-way pay: whichever symbols complete a win are pulled from the grid, two more slot in above them, and the vacated space becomes room for the board to expand into on both read directions. A round opens on a default five reels by three rows and can grow well beyond it, taking ways to win from 486 at the start up to 33,614 at full stretch. A murky fantasy-kingdom backdrop frames the reels, with a castle visible through the transparent grid and a dramatic, chase-scene soundtrack running underneath.

The paytable splits into four bands: a set of royal-card lows, four coloured gem mid-pays, four dragon-clutched gems as the high tier, and a single super-high symbol worth 100x the stake for five of a kind. Wild symbols substitute for any of these, though the higher-tier symbols — the dragon gems and the super high — only enter play once a pop has occurred, never appearing organically from a plain spin.

A multiplier meter builds alongside the pops: each block of seven popped symbols adds one to a running total applied across the whole board. Once every reel has expanded to its seven-row maximum, a bonus mode switches on — a wild is added to the mix, the multiplier climbs by two per block instead of one, and only a single new symbol fills each pop rather than two, with ways to win reaching their full 33,614 in this state.

AvatarUX prices PopRocks at a 96.8% RTP with a 22.0% hit frequency, high volatility, and a maximum win of 72,188x the stake. Bets run from 0.10 to 30 a spin. Outcomes lean heavily on whether a chain of pops gets going: short spins with no chain pay little, while a sequence that reaches the expanded, wild-enhanced state can multiply quickly once it does.