37 free demo slots from Play'n GO
The studio that built grid-based slots into a genre. Play'n GO made its name on cluster-pay games like Reactoonz and Moon Princess, where symbols clear on 5x5 and 7x7 grids instead of spinning on reels. Privately held, founder-run, and with a catalog that includes both these signature grids and traditional reel formats.
Play'n GO
Play'n GO is a Swedish indie studio that did something rare in iGaming: invented an entire slot category. While competitors chase Megaways licenses and bonus buy trends, this founder-owned company built its identity around grid-based slots - cluster-pays games on 5×5 and 7×7 grids that feel nothing like traditional reels. The catalog spans 400+ titles across 35 regulated markets, privately held after nearly three decades. No acquisition, no IPO, no conglomerate parent.
Reactoonz (2017) put Play'n GO on the map for serious slot enthusiasts. A 7×7 grid where wins cascade, a Quantum meter charges through four features, and the Gargantoon - a 3×3 Wild that splits into smaller Wilds - delivers the big hit. But Reactoonz was one piece of a broader design philosophy.
Moon Princess uses a 5×5 grid with three anime princesses, each bringing a unique "Girl Power" that activates between spins. Rise of Olympus applies the same format to Greek gods. Honey Rush deploys a hexagonal honeycomb layout. Viking Runecraft adds level progression to a 7×7 grid. Each game ships with a named feature system - Rush Meters, Portal Meters, Quantum Features - creating distinct gameplay loops rather than reskinned bonus rounds.
The common thread is the charge meter. Most Play'n GO grid slots build toward something. You collect symbols, fill a meter, unlock increasingly wild effects. Tome of Madness hits thresholds at 7, 14, 27, and 42 symbols. Reactoonz queues four features before unleashing Gargantoon. This creates a session arc - a sense of building toward something - that flat bonus triggers don't replicate. It's the studio's actual signature, more than any single game.
Book of Dead (2016) is the most-played online slot of the last decade by any reasonable measure. A 5×3 high-volatility game with expanding symbols in free spins, it became the default welcome bonus slot across European casinos. The character - adventurer Rich Wilde - first appeared in Aztec Idols (2013) and now anchors a universe that includes his daughter Cat Wilde and uncle Gerard.
The "of Dead" series alone runs to eight or nine titles. The Reactoonz/Toonz family spans seven games. Moon Princess has five variants. Fire Joker spawned a half-dozen spinoffs. And the "100 series" - enhanced remakes with rising multipliers pushing max wins from 5,000x to around 15,000x - revitalizes older hits like Gemix and Viking Runecraft. Maybe 30 games carry the commercial weight of the full catalog. The quality drops off past that top tier, and the deeper catalog has a lot of forgettable filler.
Play'n GO also refuses to implement bonus buy features. This frustrated players initially, but the UK and Netherlands subsequently banned the feature - which made the studio look prescient rather than stubborn.
Every Play'n GO slot ships with five certified RTP settings: roughly 96%, 94%, 91%, 87%, and 84%. Operators choose which tier to deploy. In UK-regulated casinos, the floor sits at 91%. In Curaçao-licensed casinos, there's no floor at all - meaning Book of Dead could run at 84% RTP.
These tiers are public knowledge at this point. The practical issue: many operators now default to the 94% setting rather than 96%, and the ability to verify RTP through browser developer tools has been removed. The in-game help file should still display the active RTP in regulated markets, but that reduction in transparency was a bad move. The single most common question around Play'n GO slots is what RTP you're actually getting - and the studio has made it harder to answer.
Play'n GO's art direction is consistent, the math models create real tension, and grid slots feel like the studio's own territory in a way few providers can claim about any format. The five-tier RTP system is the asterisk on all of it. Book of Dead at 96% and Book of Dead at 84% share a name and nothing else - the gap over thousands of spins turns a reasonable game into a bad bet.
