Apps similar to Castle Game Engine include Godot Engine, which is free and open source. Other options are Unity, Unreal Engine, GDevelop and Candlestick. There's no shortage of Game Development Tools like Castle Game Engine, with more than 50 alternatives for Windows, Linux, Mac, Android and the web.
Leadwerks Game Engine provides the smoothest learning curve to take you from beginner to full-fledged game developer. Use the visual editor and the flowgraph system to set up game interactions without code. Use Lua to write your own game scripts.
United States
Verus Engine is a modern, platform-agnostic 3D game engine. It is developed using C++ and HLSL. It is based on Direct3D 12 and Vulkan graphics APIs. The code is user friendly and well optimized.
Estonia
EU
Valkyrie is a no-code creative platform that lets designers combine digital assets and create applications and interactive prototypes: where the power of Unity meets the usability of Photoshop.
United Kingdom
A cross-platform 2D game prototyping framework based on OpenGL and C++.
Angel balances the speed and flexibility of native code with an eye towards rapid iteration and out-of-the-box functionality. In a world of web games and memory-managed scripting engines, sometimes you still.
Free online 3D Game Maker. Make your own 3D games online! Create Games for Web, Mobile and Desktop. Easy to use.
melonJS is an open source HTML5 game engine that empowers developers and designers to focus on content.
Orx is an open source, portable, lightweight, plugin-based, data-driven and extremely easy to use 2D-oriented game engine. Orx is mostly written in C, but allows you to develop with it with any language that can interface to C.
Esenthel is a next gen, cross-platform C++ game engine that comes with a lighting fast, high performance game engine with advanced graphics and physics and support for multiplayer and UNLIMITED size worlds which is make the engine well suit even MMORPG titles.
PolandEU
Japan
Limon is a multi platform 3D game engine mainly focusing on first person games. Focus of its development is ease of use and ease of study. It has builtin editor for maps, animations and GUIs.
Game Builder is an experimental game-building sandbox. Create games within a 3D game world you create. Choose from thousands of ready-made 3D models through Poly. Design game logic by arranging various blocks in a sleek drag-and-drop interface.
United States
