One of the most popular alternatives to Unity is Godot Engine, which is free and open source. Other popular alternatives are Unreal Engine, GDevelop, Candlestick and CRYENGINE. You're spoiled for choice with Game Development Tools like Unity: we list more than 100 alternatives for Windows, Linux, Mac, the web and Android.
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.
MAGE stands for MAKE A GAME EXPERIENCE
The goal for MAGE is to make it as easy as possible for people to create their own 3D universes, adventures and stories. PLAY WHILE YOU CREATE!.
Build your own 3D MMORPG with easy visual editors. Custom Classes, Items, Quests, and Combat, right out of the box. Online instantly, no manual server management required.
Open-Source Game Engine for Board Games / Card Games / Tabletop Games. Write simple functions that describe how the game state changes when a particular move is made. This is automatically converted into a playable game complete with online multiplayer features, all without...
VERGE is a Game Creation Engine: A progam that exists to help you make games in 16bits like super nintendo.
Glide is a SpriteKit and GameplayKit based engine for building 2d games easily, with a focus on side scrollers. Glide is developed with Swift and works on iOS, macOS and tvOS.
