Professor Clank’s Combinator

Professor Clank's Combinator (Reelplay): Slot Overview

This edition of Professor Clank's Combinator comes from Reelplay and takes a lower-volatility approach to the same steampunk-inventor concept, running on a 6-reel grid with up to 707 ways to win, an RTP of 96.1%, and a maximum win listed at 10,000x the stake (roughly €250,000). A confirmed hit frequency of 24.5% means a win lands on close to one in every four spins, with betting running from 0.20 up to 25 per spin.

Theme & Presentation

Set inside a brass-fitted Steampunk workshop that fizzes, pops and jiggles in time with the action, this version leans fully into playful mechanical mayhem. The visual quality is strong throughout, giving the whole game a colourful, energetic personality that fits comfortably within the wider steampunk-inventor slot genre without feeling like a straight copy of any one influence.

Grid & Symbols

The action plays out on an initial 6-reel, 3-row grid offering up to 707 ways to win. The paytable opens with welded-steel-styled card royals (9 through A) paying modest amounts for six of a kind, stepping up to spanners, goggles, blasters and robot symbols worth considerably more at the top end. A Professor wild appears on reels 2, 3, 4 or 5, substituting for every symbol except the scatter to help complete combinations.

Core Feature: Explosions, Morphs, Boosters & Drops

Whenever a winning combination lands, every non-winning symbol except the scatter is cleared from the grid to make way for new symbols to drop in, continuing the chain for as long as fresh wins keep appearing. This interconnected system of explosions, morphs and boosters is the engine behind the game's central Bonus Respin feature, giving each winning sequence the chance to snowball into something considerably bigger before it finally runs its course.

RTP, Hit Frequency & Volatility

At 96.1% RTP with a confirmed 24.5% hit frequency, this version pays out noticeably more often than a typical high-volatility slot, which lines up with its Low volatility rating. Roughly every fourth spin produces some kind of return, making for a steadier, more frequent-paying session than many modern cascading slots — a deliberate trade-off against the size of individual wins, which tend to be more modest outside of a strong feature run.

Max Win & Betting Range

Despite the low volatility tag, the maximum win still reaches 10,000x the stake (about €250,000), showing that the game's ceiling remains genuinely high even if it's statistically rarer to reach at this pacing. With stakes from 0.20 to 25, it's accessible across a wide range of bankroll sizes.

How This Compares To Other Editions

Professor Clank's Combinator also exists in a separate, medium-volatility Yggdrasil edition with different pacing and features, so it's worth treating this Reelplay version as its own distinct release rather than assuming identical behaviour across the board — the low volatility and confirmed 24.5% hit frequency here make for a noticeably steadier ride.

Final Verdict

This Reelplay edition of Professor Clank's Combinator suits players who'd rather see regular, frequent wins than wait out long dry spells for a single big hit, while still keeping a substantial 10,000x ceiling in play. Try the free demo at johnessyslots to get a feel for the Bonus Respin chain before playing for real stakes.