Comparison

Invasion vs Contagious Mayhem

Price, ratings, monetisation and update history for both games, side by side โ€” with what reviewers say about each.

Head to head
About

Invasion

Features
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Winner of all hearts and the competition orchestrated, the spinoff of the space themed science-fiction action FPS game Invasion developed by CDIS Lab. which takes place at the first landing at the start of the game. It is a great representation and a challenge for the players to make a safe landing to colonize mars. Defying gravity with a spaceship requires the instincts of a true captain. A soft touch is necessary for not blowing up the ship or launching it into the space so try to land as smoothly as you can. As hard as it seems this classical game will make sure you have a great time.

About

Contagious Mayhem

Features
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Get ready to dive into the microscopic world with "Contagious Mayhem"! This game provides a perfect blend of fun, learning, and excitement, that transforms you into a virtual germ fighter. In this fast-paced and thrilling game, your mission is to sanitize various surfaces and spaces, all teeming with a variety of microbes that you need to identify and disinfect. As you progress, you'll encounter tougher, more resilient germs, bacteria, viruses, and fungi, each with its unique strengths and weaknesses. Utilize a wide array of disinfectants, each equipped with unique capabilities to combat different types of microbes. The game encourages strategic thinking as players must decide the best approach to handle each wave of microbial invasion. But the game isn't just about mayhem! It's also an educational tool, giving players a better understanding of different types of microbes, their characteristics, and how they spread. Through engaging gameplay, players learn about hygiene and public health in a way that's fun and interactive. With high-quality graphics, a captivating storyline, and countless levels, Contagious Mayhem offers endless entertainment while promoting science education. Perfect for players of all ages looking for a game that's as challenging as it is enlightening. So gear up and join the fight against germs in Contagious Mayhem, where every clean surface is a victory! The game has been developed in the Peliselli project (The project is funded by the REACT-EU instrument's appropriations as part of the actions implemented by the European Union in response to the COVID-19 pandemic) and in the ARPO project funded by the Regional Council of Satakunta. The making of the game has also been funded by the Academy of Finland (decisions 337863 and 337861). In collaboration with: SAMK โ€“ Wander Research Centre, SAMK, and the City of Rauma.

Screenshots

Invasion3 screens
Contagious Mayhem4 screens

Verdict

The call

The clearest difference is ads: Contagious Mayhem at none against Invasion's shown. Contagious Mayhem also leads on update cadence (every 2 months vs every 14 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Invasion ships an update every 14 months, Contagious Mayhem every 2 months. The most recent releases landed on October 3, 2026 and October 18, 2026 respectively.

Scorecard2 real differences ยท 4 level
Invasion versus Contagious Mayhem: the parameters behind the verdict, then further details
ParameterInvasionContagious Mayhem
PriceFreeFree
Update frequencyEvery 14 monthsEvery 2 months โ€” better
AdsYesNo โ€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 โ€” better12.0
Further details โ€” not scored
Size19 MB147 MB
Age rating4+12+
DeveloperSafak YalcinkayaSatakunnan Ammattikorkeakoulu Oy

In-app purchases

None

Invasion

No in-app purchases

None

Contagious Mayhem

No in-app purchases

Questions

Is Invasion free?
Invasion is free to download, with no in-app purchases.
Is Contagious Mayhem free?
Contagious Mayhem is free to download, with no in-app purchases.
Do Invasion or Contagious Mayhem have ads?
Invasion shows ads; Contagious Mayhem does not.
Which is updated more often, Invasion or Contagious Mayhem?
Invasion ships an update every 14 months, and Contagious Mayhem every 2 months. Most recently, Invasion was updated on October 3, 2026 and Contagious Mayhem on October 18, 2026.

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