Imperial Crown Diamond Mystery
Imperial Crown Diamond Mystery

Imperial Crown Diamond Mystery

Win one of the four mysterious jackpots worth up to 5,000x your stake when you play this eye-catching addition to the Greentube’s Diamond Mystery slot series, Imperial Crown. 

  • RTP: 95.45%
  • VOLATILITY: medium

What does John have to say?

Plenty of fun awaits any lucky player in this modern classic, combining familiar fruit symbols and thrilling jackpot winning chances.
  • Expanding wild symbols
  • Star scatters pay in any position
  • Four jackpots worth up to 5,000x your stake
  • Low RTP level

Imperial Crown Diamond Mystery Review

Imperial Crown is a very sleek 5×5 reel slot from Greentube and the 7th addition to the developer’s hit Diamond Mystery slot series, giving you a chance to win 5,000x your stake. The theme is classic fruit and hence features some of the most traditional symbols with an addition of expanding crowns and two star scatters. It looks like a fun and easy game to play, so come along as we explore the features further in our slot review below.

SLOT FEATURESExpanding Wilds, Gamble Feature, Diamond Mystery Jackpot
RELEASE DATE8th March 2022
GAME PROVIDERGreentube/Novomatic
SLOT TYPEJackpot Slot
BET LEVELS0.20 – 50
MAXIMUM WIN5,000x Your Stake

Imperial Crown Diamond Mystery Bonus Features

Imperial Crown doesn’t have any usual bonus rounds, but it comes with the Diamond Mystery bonus feature containing four jackpots. The other key features that could increase your wins include expanding wilds, scattered stars and the gamble option.


Appearing on reels 2, 3 and 4 only, the glossy red and gold crown is the game’s wild symbol that substitutes for all other symbols except scatters to help create a winning combination. The instant it’s involved in a win, it will also expand to cover its entire reel, helping you hit any additional wins available.


Red and blue star symbols are scatters that can award a win regardless of their position on the reels. When 3 blue stars appear on reels 1, 3 and 5, they’ll pay 20x your stake. Landing 5 red stars anywhere on the reels will result in a win of 100x your stake.

Double or Nothing Gamble

After every win, you have a chance to double your current play balance with the gamble feature. All you have to do is guess the correct card colour. If you get it right – you win; if not, you’ll lose everything unfortunately.

Imperial Crown Diamond Mystery Jackpot

The gem-based 4-level Diamond Mystery jackpot feature can trigger randomly on any non-winning spin. Matching 3 gems during this 12 card game, awards one of the following jackpots:

  • Green gem jackpot – 50x your stake.
  • Blue gem jackpot – 200x your stake.
  • Red gem jackpot – 1,250x your stake.
  • Diamond jackpot – 5,000x your stake.

RTP and Volatility

This classic 5-liner comes preset with a medium volatility, fetching steady wins of varying sizes. The RTP rate of 95.45% is quite common for Greentube, but slightly low for our liking.

Where to Play Imperial Crown Diamond Mystery

Play Imperial Crown at Spinit and Mr Green or pick your favourite site from our extensive list of online casinos, featuring many other games from the same developer.

Imperial Crown Diamond Mystery on Mobile

Thanks to the slot’s mobile-friendly setup, you can enjoy spinning the classy reels of Imperial Crown on any Android or iOS device.

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