Game engine supporting many 3D/2D formats and graphic effects
Java/JavaFX/Kotlin Game Library (Engine)
Engo is an open-source 2D game engine written in Go
Orx: Portable Game Engine
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Space shooter style game arcade version - Games/Entertainment Software
2D Game Engine
games for kids
ZED OS the clone of Windows XP
A cross-platform 2D game engine
Cross-platform 2D and 3D game engine
A 2D game about Bunny and coronavirus
Free and Open Game Programming Language for Windows and GNU/Linux
Test project with a 2D platform game developing in Godot 3.1
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
RelaxChess, chess game that makes no search futher needed for a wow
Paintown is a 2d fighting game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Egret is a brand new open mobile game and application engine
2D physics engine for games
Version 1.2
C-Lesh is a game programming language for 2D games.