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Novomatic (Greentube)

Rainbow King

Fantasy / Royalty

Rainbow King is a colourful fantasy-themed video slot by Novomatic, built on a 5x3 grid with 20 adjustable paylines and a cast of regal symbols including castles, crowns, gems and the Humpty Dumpty-esque king himself. The game is a sequel to the classic Reel King slot and packs three distinct bonus features — Cash Castle, King Cash, and the Rainbow King board game — each triggered by landing 3+ of their respective scatter symbols. With low volatility and a wide betting range, it appeals to casual players seeking frequent bonus triggers and steady entertainment.

95%
RTP
12,500x
Max Win
Low
Volatility
Hit Frequency
5x3
Reels
€0.01
Min Bet
Analysis
RTP95% vs 96.1% avg
VolatilityLow
Max Win Potential12,500x
Bonus Features
Adjustable Paylines (1–20)Cash Castle Pick-Em Bonus (2x–500x bet)King Cash Pick-Em Bonus (up to 500x bet)Rainbow King Board Game FeatureReel King Spins (mini 3-reel sevens bonus)Wild Symbol
Features at a Glance
Free Spins
Buy Feature
Megaways
Cluster Pays
Cascading Reels
Multipliers
Sticky Wilds
Mobile
RTP Analysis

Rainbow King has an RTP of 95%, which is 1.10% below the industry average of 96.1%.

With low volatility, wins come frequently but tend to be smaller — ideal for players who prefer steady gameplay with lower bankroll variance.

* RTP is a theoretical long-term return percentage. Individual session results vary significantly.

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