Super Marble is a 2019 release from Tom Horn Gaming, the Slovak studio that consistently produces technically competent mid-market slots with clearly defined themes. The marble-run concept — marbles rolling through tracks and channels, collecting prizes as they travel — translates naturally into a slot context where the marble symbols function as the game’s most mechanically significant icons. Built on a 5×3 reel set with 25 paylines, the game is conventional in structure but effective in how it executes the sport-and-collection theme.

The 25-payline grid runs from $0.10 to $100. Medium volatility places Super Marble in comfortable mid-range territory — wins arrive with enough regularity to sustain sessions, while the respin feature creates occasional sharp prize spikes above the base-game average. Marble wild symbols substitute for all standard icons when completing winning combinations, and it is these symbols that drive the game’s bonus mechanic in a direct and readable way.

The respin feature activates when marble symbols land on the reels. Marble icons lock in position and up to three respins are awarded, during which additional marbles landing also lock and participate in the prize accumulation. This collect-and-lock structure is familiar territory — the same basic architecture as Hold and Spin variants across the industry — but Tom Horn applies it at a modest scale appropriate to a medium-volatility game. The marble prizes accumulate across the respins, and the feature resolves once no new marbles land or the respins are exhausted. Maximum win is 5,000x the bet.

RTP is 95.00% and volatility is medium.

Super Marble is a well-executed Tom Horn title that uses its theme purposefully and delivers a respin feature that fits the game’s overall register. Nothing here will surprise experienced players, but the execution is clean and the marble theme lends the mechanic a natural coherence that less considered competitors lack.