The 3D Game Engine
Built for Indies

Instead of "faking a free engine" like others do, Cave is a paid engine with no royalties. This means you pay once and everything you create belongs 100% to you. No hidden fees, no percentages taken from your sales. Many developers actually prefer this because it's simple and predictable — especially indies who want to keep their revenue.

One of our main design principles is that a software is like a joke: if you need to explain it, it isn't that good. Unfortunately, the current game dev world is filled with hard and complex game engines that requires a steep learning curve, to a point where devs consider this normal and expect that. But Cave is built different: it's meant to be as intuitive and straight forward as possible, with no need to waste hours trying to learn everything. Most of the times, simply mouse hovering the options in the engine itself shows enough documentation for you to understand what's going on and if that's not enough, Cave comes with a full Python API Documentation, stubs and an entire book, called "The Cave Engine Bible", for you to understand everything about the tool. If you still need help or assistance, you have access to support by the official engine development team here at Uniday Studio.

Yes! Cave has been in development for over a decade and is actively used by us to build and ship commercial games like Crow. It includes everything you expect from a modern engine: PBR rendering, animation, physics, Steam integration, and export tools.

Yes, you get direct support from the developers, plus free updates for all 1.x releases, which will likely get you covered for many years to come. And your license is perpetual: you can keep using the engine forever.

Not at all. Cave itself is written entirely in C++, for maximum speed. Python is only a scripting layer calling into fast C++ APIs — and most scripts are auto pre-compiled for extra performance. We've shipped an open-world game with thousands of Python-driven entities without hitting any performance issues.

Cave is not meant to replace Unreal in AAA studios. Instead, it's focused on indie developers who want speed and control without unnecessary complexity. If you want to make high-quality PC games without waiting for shaders to compile or fighting endless settings, Cave is the sweet spot between Unity and Godot's simplicity and Unreal's power. Users often say Cave is faster, easier, and more intuitive than those engines, while still giving them professional results.