Cyrus the Virus from Yaggdrasil Gaming

RTP: 96.3%

Enter the microscopic world of Cyrus the Virus! Let the cells multiply your wins.

Enter a weird and wacky microscopic world in Cyrus the Virus, a quirky and engaging classic slot from Yggdrasil Gaming. This title shrinks you down to size to meet a cast of colorful and contagious critters. Its main attraction is a simple yet powerful game engine that pays both ways, combined with an Expanding Wild Respin feature on the middle reel. Let the cells multiply your wins and catch a fever for this unique and fun mobile slot!

Provider: Yggdrasil Gaming
Release Date: 2015
RTP: 96.3%
Volatility: Medium
Max Win: 2,000x
Theme: Microbes / Science / Humor / Cartoons
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Feature Value
Reels 5
Rows 3
Paylines 10 (pays both ways)
Min Bet €0.10
Max Bet €40
Max Win 2,000x
Jackpot No
RTP 96.3%
Volatility Medium
Hit Frequency 21.8%

Thematics and Design: The game is set in a strange, microscopic environment, with the reels populated by weird and wonderful virus characters. The design is colorful, playful, and humorous, turning a potentially gross subject into a fun cartoon world.

Graphics and animations: The graphics have a clean and vibrant 3D cartoon style that has aged very well. The virus characters are full of personality, with funny faces and animations. The expansion of the wild symbol is a slick and satisfying visual highlight.

Sound Accompaniment: A quirky and weird electronic soundtrack plays, with bubbly, squishy sound effects that perfectly match the microscopic theme. The gurgles and cheers of the little viruses add to the game’s unique and humorous charm.

Regular Symbols: The game features seven regular symbols, all represented by different colored and shaped virus characters. The large, blue, spiky virus is the most valuable symbol in the game.

Special Symbols:

  • Wild Symbol: A multi-colored, complex virus strand is the Wild. It only appears on the middle reel and is the key to triggering the game’s only bonus feature.

Getting infected is easy. Set your bet, then hit the ‘Spin’ button. The game features 10 paylines that pay from both left-to-right and right-to-left. The main feature is triggered by landing the special Wild on the middle reel. To see how this contagion spreads, we recommend trying the free slot machine demo on our site. The game is perfectly optimized for a microscopic adventure on any mobile device.

Expanding Wild Respin

This is the central and only bonus feature of the game. The Wild symbol can only land on the third (middle) reel. When it appears, it will expand to cover the entire reel. This expanded wild will then lock in place and award one free respin with the wild reel held, creating a huge chance for multiple 5-of-a-kind wins, especially with the “pays both ways” mechanic.


RTP: This high RTP slot has a Return to Player of 96.3%, which is above the industry average and offers players great theoretical value.

Volatility: This classic slot has medium volatility. This creates a well-balanced experience. The “pays both ways” system and high hit rate ensure frequent wins, while the expanding wild respin provides the potential for bigger, screen-filling payouts. It’s a perfect game for players who enjoy consistent action.


Cyrus the Virus is a fantastic example of brilliantly simple slot design. It focuses on one core mechanic and executes it perfectly. The theme is quirky and memorable, and the balanced gameplay is incredibly satisfying. It’s a timeless classic that proves a game doesn’t need to be overly complicated to be hugely entertaining. It’s a contagiously fun slot that we highly recommend catching.

Pros Cons
✅ Fun and unique theme with great graphics ❌ Very simple with only one bonus feature
✅ Pays both ways for frequent action ❌ Max win is relatively low
✅ Exciting expanding wild respin feature ❌ Can feel repetitive over very long sessions
✅ High RTP of 96.3%

Suitable for: Casual players, fans of simple mechanics, and anyone who enjoys quirky, humorous slots.


What is the RTP of Cyrus the Virus?

The RTP of this slot is a high 96.3%.

Can I play Cyrus the Virus for free?

Yes, a demo of this free slot machine is available on our site for you to catch the virus without any risk.

Does this game have a free spins feature?

No, it does not have a separate free spins round. Its only bonus feature is a powerful Expanding Wild Respin that triggers when a wild lands on the middle reel.

What is the maximum win in Cyrus the Virus?

The maximum potential win is 2,000 times your total bet.

Is Cyrus the Virus mobile-friendly?

Yes, the game is perfectly optimized with HTML5 to deliver its quirky visuals on all modern mobile devices.


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  • Incinerator (Yggdrasil): A Yggdrasil slot with a different theme but a similar focus on a single, powerful base game feature.
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