KlayGE is a cross-platform open source game engine
An engine for describing games built around Xerces, exprtk, and SFML
A fun realistic multiplayer free-and-open-source first-person-shooter!
RPG dice roll simulator for vintage Tandy TRS-80 100/102/200 laptops
A 2D game engine and level editor
Remake of The Secrets of Dyrt
A complete framework for Godot to create beautiful and complex AI
A cross-platform 2D game engine
An opinionated 2D game engine for Rust
Small tool to dump/convert/ripping physical CD or virtual images
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
8-bit Graphical API for Java
IGS Labs
A cross platform Lua based game engine
higan is a multi-system emulator focused on accuracy & preservation
Novellotyk is the engine for writing visual novels using freepascal
A fast, scalable, distributed game server engine/framework for C++
lzdoom plus freedom
Cross-platform 2D and 3D game engine
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Versión de Código Abierto de Z The Bitmaps Brother en Español
Opensource Game Studio
A WebSocket library optimized for multiplayer JS games