2D

Free and open-source 2D game engine.

[CC BY-NC-SA] A compendium of the community knowledge on game design and development

2D polygon geometry helper functions, suitable for image analysis.

Character Sprite Generator

2D planes combat game with custom game engine

VideoGames learn

PythoCup based on Pygame

A little 2D/3D game engine not pretentious.

[Uc3m] The Classic Donkey Kong game

[MIRROR] Soldat is a unique 2D (side-view) multiplayer action game

Vision Pipeline for ROS CORE/API

2D object detection in cluttered scene

2D single object detection

Air Goose is a game engine for 2D games with support for animations, text, collision, and audio. It is licensed under GNU General Public License, version 3 or later (GPLv3+).

Action RPG dungeon crawler.

Client Mod for Teeworlds v0.6.x

Tic Tac Toe the game written in python 2.7ish (with a future import)