Shapez.io

A dead simple 2D game engine for Go

A Flutter based game engine.

Terasology - open source voxel world

Esoterica Engine

A game engine made as part of the Kohi Game Engine series on YouTube (and Twitch!), where we make a game engine from the ground up using C and Vulkan.

Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.