Unity Engine Under Scrutiny: Critiques from ‘Among Us’ and ‘Slay the Spire’ Developers

Gamersadmin September 15, 2023

The Unity game engine, a powerful and versatile tool that has enabled countless developers to create video games, has recently come under scrutiny from some of its most prominent users. Among the voices of concern are the creators of the wildly popular games “Among Us” and “Slay the Spire.” In this article, we’ll explore why these developers have joined the chorus of criticism directed at Unity, and what it means for the future of game development using this widely-used engine.

The Rise of Unity Engine

Unity is a game engine that has played a pivotal role in the democratization of game development. It provides developers with a user-friendly platform to create games for a variety of platforms, including PC, consoles, mobile devices, and virtual reality. Over the years, Unity has become the go-to choice for many independent developers, enabling them to turn their creative visions into successful games.

“Among Us” and “Slay the Spire”: Success Stories

“Among Us,” developed by InnerSloth, and “Slay the Spire,” created by MegaCrit, are two shining examples of indie games that achieved massive success. “Among Us” took the gaming world by storm with its social deduction gameplay, while “Slay the Spire” garnered praise for its roguelike card-based mechanics. Both games were built using Unity, which played a crucial role in bringing their unique concepts to life.

Recent Criticism

Despite its widespread adoption and success stories, Unity has faced criticism from some developers. Concerns range from technical limitations and performance issues to licensing costs and the engine’s development roadmap. Recently, the creators of “Among Us” and “Slay the Spire” joined the conversation, voicing their own grievances.

InnerSloth’s criticism largely revolves around performance issues with Unity’s networking system, which impacted the gameplay experience of “Among Us.” The developers noted that addressing these issues required a considerable amount of time and effort.

MegaCrit, on the other hand, expressed concerns about the costs associated with Unity’s cloud-based services. They argued that the pricing structure for these services wasn’t sustainable for indie developers, potentially hindering the development of future projects.

Unity’s Response

Unity Technologies, the company behind the engine, has acknowledged the criticism and is actively working to address some of the concerns. They have committed to improving networking performance and optimizing the engine for better scalability, which should benefit games like “Among Us.”

In response to cost concerns, Unity Technologies has also introduced a “Unity Game Growth Program” aimed at supporting smaller studios with revenue-sharing opportunities and other resources.

The Future of Unity Engine

The criticism from developers like InnerSloth and MegaCrit highlights the challenges faced by indie game creators when using Unity. While the engine has been a powerful tool for many, it’s clear that improvements are needed in areas like performance and affordability to better serve the diverse range of developers who use it.

As Unity Technologies continues to address these issues, the engine remains a vital resource for game development. The voices of developers, both large and small, contribute to its ongoing evolution, ensuring that Unity remains at the forefront of the industry.


Unity engine has been instrumental in empowering indie developers to bring their creative visions to life, but it is not without its challenges. The recent criticism from “Among Us” and “Slay the Spire” creators underscores the importance of addressing technical limitations and affordability concerns to ensure that Unity continues to be a valuable tool for game development across all scales. As Unity Technologies responds to these concerns, the future looks promising for both the engine and the vibrant community of developers who rely on it to create innovative and engaging games.


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