Can You Build Games with Kotlin? Here’s What You Should Know

Kotlin has quickly become one of the most loved programming languages for Android development, praised for its concise syntax, safety features, and seamless interoperability with Java. But beyond mobile apps, many developers are curious about its potential in game development. Can you really build games with Kotlin, or is it better to stick with traditional game engines and languages like C++, C#, or Java? In this article, we’ll break down everything you need to know about Kotlin for game development—from tools and frameworks to performance considerations and real-world examples.

Why Kotlin Is Gaining Attention in Game Development

When Kotlin was first introduced, it quickly caught the attention of Android developers who were tired of Java’s verbosity and boilerplate. Since then, it has steadily grown into a mainstream language, not just for app development but also for other use cases such as backend systems, scripting, and game development. The question is: why are more developers considering Kotlin for building games?

Modern Language Features That Fit Game Dev

Game development often involves handling complex logic, real-time performance, and resource-heavy tasks. Kotlin offers several features that simplify these challenges:

• Concise syntax: Reduces unnecessary lines of code, which makes game logic easier to manage.
• Null safety: Prevents runtime crashes that could ruin a gameplay experience.
• Coroutines: Great for managing asynchronous tasks such as rendering animations, handling physics updates, or loading game assets without blocking performance.
• Extension functions: Allow developers to extend game objects and classes without modifying their original code.

These features not only improve productivity but also reduce bugs, making the game development process smoother.

Interoperability with Java Frameworks

Kotlin runs on the JVM, meaning any Java library, framework, or engine can be used seamlessly with it. This is a major advantage because many existing game development frameworks—like LibGDX—are Java-based. Developers don’t have to reinvent the wheel; they can leverage mature tools while writing cleaner and more modern code in Kotlin.

Growing Ecosystem and Community

Kotlin’s ecosystem has grown rapidly, backed by JetBrains and supported by Google. With more tutorials, sample projects, and open-source experiments being shared, game developers have an easier time adopting Kotlin for their projects. Communities around engines like KorGE demonstrate how Kotlin can be applied to gaming specifically.

Why Indie Developers Are Interested

Unlike AAA studios that require raw performance and rely heavily on C++, indie developers often look for productivity and cross-platform support. Kotlin is particularly attractive for this audience because:

• It allows code sharing across platforms through Kotlin Multiplatform.
• It’s easier to learn for Android developers who want to branch into games.
• It allows quick prototyping without sacrificing stability.

Key takeaway: Kotlin is gaining attention in game development because it combines modern language features, strong interoperability with Java frameworks, and cross-platform potential, making it especially appealing for indie developers and small teams.

The Tools and Frameworks That Make Kotlin Game Development Possible

Before diving into game development with Kotlin, it’s essential to understand the tools that make it possible. Unlike C++ or C#, Kotlin doesn’t have a long history of specialized engines, but its JVM compatibility and community-driven tools give it a surprising edge.

Frameworks Compatible with Kotlin

Here are the most popular options available:

• LibGDX
• A mature, Java-based game framework that works seamlessly with Kotlin.
• Supports 2D and 3D game development.
• Can deploy games across Android, iOS, desktop, and HTML5.
• Large existing community and tutorials make it beginner-friendly.
• KorGE
• A Kotlin-first, multiplatform game engine designed specifically for 2D games.
• Allows deployment to Android, iOS, desktop, and web from one codebase.
• Comes with built-in physics, asset management, and sprite animation tools.
• Especially appealing for indie developers wanting a “Kotlin-native” solution.
• OpenGL/DirectX Bindings
• Through Java bindings, developers can work with low-level graphics APIs.
• Offers flexibility for custom engine building.
• Requires more advanced knowledge and time investment.
• Unity/Unreal (limited integration)
• Not officially compatible with Kotlin.
• Kotlin can sometimes be integrated into Android modules for Unity projects, but it’s not the primary workflow.

Comparison Table of Frameworks

Why These Tools Matter

Kotlin’s flexibility lies in the fact that it can be paired with Java-based frameworks like LibGDX or embraced natively through KorGE. Whether you want to experiment with small 2D games or build larger projects, the ecosystem already supports multiple approaches.

Key takeaway: Kotlin offers versatile game development options—from high-level engines like KorGE to powerful cross-platform frameworks like LibGDX, providing developers with flexibility tailored to their goals.

Kotlin vs. Traditional Game Development Languages (C++, Java, C#)

When developers consider using Kotlin for games, the natural question arises: how does it compare to languages traditionally used in game development?

Kotlin vs. C++

• Strengths of C++:
• Industry standard for AAA games.
• Provides raw performance and direct access to hardware.
• Extensive libraries and decades of optimization.
• Limitations for Indie Developers:
• Steep learning curve.
• Longer development cycles due to complexity.
• Kotlin’s Role:
• Not suitable for performance-heavy AAA titles but excellent for smaller 2D or mobile games.
• Easier to learn and more productive.

Kotlin vs. C#

• Strengths of C#:
• Dominates through Unity, the most widely used game engine.
• Strong ecosystem, tutorials, and asset store.
• Limitations:
• Primarily tied to Unity’s ecosystem.
• Less flexibility outside Unity compared to Kotlin.
• Kotlin’s Role:
• More versatile for cross-platform projects outside Unity.
• Developers may find Kotlin’s syntax and coroutines more modern.

Kotlin vs. Java

• Strengths of Java:
• Already widely used with frameworks like LibGDX.
• Stable and mature ecosystem.
• Limitations:
• Verbose and less modern compared to newer languages.
• Kotlin’s Role:
• Seamlessly interoperates with Java while offering conciseness, null safety, and modern features.
• Often considered an upgrade to Java for game development.

Summary Comparison

Key takeaway: Kotlin won’t replace C++ or Unity’s C#, but it strikes a balance between productivity and flexibility, making it an ideal choice for indie, mobile, and multi-platform games.

Can Kotlin Be Used for Cross-Platform Games?

Cross-platform support is one of the most important considerations for developers today. With players spread across mobile, desktop, and web, creating a game for just one platform can severely limit reach. Fortunately, Kotlin has strong cross-platform potential.

Kotlin Multiplatform in Gaming

Kotlin Multiplatform allows developers to write shared game logic while still customizing platform-specific parts. For example:

• Physics and rendering engines can be shared across all targets.
• UI or input handling can be customized per platform.
• Shared networking logic makes multiplayer features easier to manage.

Frameworks Enabling Cross-Platform Development

• KorGE: Let’s developers build once and deploy to Android, iOS, desktop, and web.
• LibGDX: While Java-first, it also supports multiple platforms when combined with Kotlin.

Platforms Supported

• Mobile: Android and iOS.
• Desktop: Windows, macOS, Linux.
• Web: Via JavaScript compilation.

Benefits of Cross-Platform Development with Kotlin

• Reduced duplication of code.
• Faster development and prototyping.
• Easier updates and bug fixes since logic is shared.
• Broader reach without needing multiple teams.

Challenges to Consider

• Tooling isn’t as polished as Unity or Unreal’s workflows.
• Performance may not match native solutions for heavy 3D games.
• Some APIs still require platform-specific workarounds.

Key takeaway: Kotlin’s cross-platform capabilities, particularly through KorGE and Kotlin Multiplatform, make it a practical choice for developers seeking to publish games across Android, iOS, desktop, and web platforms with a single codebase.

Real-World Examples and Success Stories of Games Built with Kotlin

Theory is useful, but developers want to see practical examples before investing time in a language. Kotlin is still emerging in the game development scene, but several examples demonstrate its potential.

KorGE Success Stories

The KorGE community showcases a variety of small 2D games built entirely in Kotlin, deployed on web browsers and mobile stores. These projects highlight Kotlin’s strength in creating lightweight, cross-platform entertainment experiences.

LibGDX + Kotlin Projects

Developers often share open-source projects on GitHub where LibGDX is used with Kotlin. Many cite reduced boilerplate, easier readability, and faster iteration compared to Java-only projects. Puzzle games, arcade shooters, and RPG prototypes are common examples.

Experimental Engines and Indie Projects

Some developers experiment with building their own mini-engines using Kotlin, often integrating OpenGL bindings. While niche, these projects demonstrate Kotlin’s flexibility and the enthusiasm of its developer base.

Why Real-World Proof Matters

Seeing actual games built in Kotlin reassures newcomers that the language isn’t just theoretical for gaming. Although Kotlin doesn’t yet power AAA titles, its presence in indie circles is growing, driven by community-driven frameworks and open-source contributions.

Key takeaway: While Kotlin isn’t yet mainstream in the AAA gaming world, its practical application in indie projects and open-source experiments demonstrates its viability for creating lightweight, multi-platform games.

Conclusion

So, can you build games with Kotlin? The answer is a definite yes, especially if you’re targeting mobile, indie, or cross-platform projects. While it doesn’t replace C++ for AAA development or C# in Unity’s ecosystem, Kotlin is proving itself as a versatile, modern option for game developers who value simplicity, safety, and productivity. With tools like LibGDX and KorGE, Kotlin’s future in game development looks bright.

FAQs

Is Kotlin fast enough for game development?

Yes, Kotlin’s performance is comparable to Java, making it suitable for 2D and lightweight 3D games. For high-performance AAA titles, C++ remains the preferred choice.

Can I use Kotlin with Unity or Unreal Engine?

Not directly, but Kotlin can sometimes be used for Android modules in Unity projects. Full integration is limited.

What’s the best framework for Kotlin game development?

For Kotlin-first projects, KorGE is a great choice. For broader Java compatibility, LibGDX works well with Kotlin.

Is Kotlin good for beginners in game development?

Yes, especially for Android developers transitioning to games. Kotlin’s concise syntax and safety features reduce complexity.

Can I publish Kotlin games on iOS and the web?

Yes, with Kotlin Multiplatform and frameworks like KorGE, you can deploy games to iOS, web, desktop, and Android.

Additional Resources