How Isometric Coordinates Work in 2D games - YouTube
camera at infinitely far away creates an orthographic projection that removes distortion of tiles due to perspective

Tiled Map Editor | A flexible level editor
A guide to level creation with Tiled [ + how to use it with pygame ] - YouTube
Tiled Map Editor Tutorial Part One: The Basics - YouTube

substack/tilemap: render isometric tile maps in the browser

nosir/obelisk.js: Build pixel isometric graphics with HTML5 canvas

Hexagonal Grids
GiovineItalia/Hexagons.jl: Useful tools for working with hexagonal grids

GameMaker

Easily Make Video Games with GameMaker

Create Your Own Infinite Platformer With GameMaker | GameMaker
I built a 3D engine in 2D (tutorial devlog) - YouTube

Box2D

erincatto/Box2D: Box2D is a 2D physics engine for games
Box2D | A 2D Physics Engine for Games

LiquidFun on Web

Handmade Hero

Handmade Hero
Annotated Episode Guide | Handmade Hero

Flecs

Flecs: Flecs
SanderMertens/flecs: A fast entity component system (ECS) for C & C++

foxnne/zig-flecs: Zig wrapper for Flecs

EnTT

skypjack/entt: Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

prime31/zig-ecs

Web

web-3d#Game Engines

HTML5 Game Engines - Find Which is Right For You
Collection: JavaScript Game Engines
Starter for the new HTML5 game developers
Modules · hughsk/game-modules Wiki
9 Top JS Gaming Engines and Libraries for 2020 | by Fernando Doglio | Bits and Pieces

Game development | MDN
Forums - HTML5 Game Devs Forum

Quick Tip: How to Make a Game Loop in JavaScript
Code inComplete - Javascript Game Foundations - Ten Essentials 2013, oldish
We Will All Be Game Programmers - YouTube

Nipplejs by yoannmoinet A virtual joystick for touch capable interfaces.

Superpowers — Free 2D+3D game maker, open source

CreateJS have multiple tools for game development
CreateJS | A suite of JavaScript libraries and tools designed for working with HTML5

React Game Kit
FormidableLabs/react-game-kit: Component library for making games with React & React Native

Matter.js - a 2D rigid body JavaScript physics engine
kripken/ammo.js: Direct port of the Bullet physics engine to JavaScript using Emscripten

rezoner/playground: Playground.js is a framework for your javascript based games. It gives you out-of-box access to essentials like mouse, keyboard, sound and well designed architecture that you can expand to your needs.

Kontra.js – What is Kontra.js?
straker/kontra: A lightweight JavaScript gaming micro-library, optimized for js13kGames.
Build a tiny game for JS13K with Kontra.js - DEV Community

cannon-es
Cloud9c/taro: A lightweight 3D game engine for the web.

goldfire/howler.js: Javascript audio library for the modern web.
React Music

Crafty - JavaScript Game Engine, HTML5 Game Engine
Stage.js - 2D JavaScript library for cross-platform HTML5 game development
Impact - HTML5 Canvas & JavaScript Game Engine
andrewrk/chem: 2d canvas-based rapid prototyping game engine

Riskmap.filkor.org
Create an interactive map using Javascript and HTML5 Canvas - filkor.org Writings

mafintosh/tetris: Play tetris in your terminal - in color
Ace Attorney Online

Cross Platforms

Consoles, PC, probably web

FNA

FNA reimplementation of the Microsoft XNA Game Studio 4.0 Refresh libraries
FNA-XNA/FNA: FNA - Accuracy-focused XNA4 reimplementation for open platforms
XNA Game Studio 4.0 Refresh | Microsoft Learn

Heaps

Heaps - Haxe Game Engine - Heaps.io Game Engine Haxe, web
Shiro’s Game Technology Stack – GameFromScratch.com

Defold

Defold - Official Homepage - Cross platform game engine targets mobile, semi-open source, 2D, Lua

Defold Crash Course Tutorial - DevGa.me

GDevelop

Free and Easy 2D/3D Game-Making App | GDevelop targets mobiles, 2D, no code, visual coding
Features | GDevelop
4ian/GDevelop: :video_game: Open-source, cross-platform game engine designed to be used by everyone.

GDevelop 5 documentation - GDevelop documentation

GDevelop Games Showcase | GDevelop
Game examples and templates made with GDevelop | GDevelop
GDevelop 5 – GameFromScratch.com

How To Make a Simple Playing Card Game with Multiplayer and Bluetooth, Part 1 | raywenderlich.com

ReactiveConf 2019 - Florian Rival: Native Web Apps: React and WebAssembly to Rewrite Native Apps - YouTube
Porting a Desktop Game Editor to the Browser with WebAssembly

Lua

LÖVE - Free 2D Game Engine
LOVE wiki
Game Development in Love2D - YouTube

CS50's Introduction to Game Development - YouTube

Aroma Aroma is game creation framework that targets Chrome’s Native Client. It lets you create games in the Lua programming language that can be be distributed through the Chrome Web Store.

Solar2D Game Engine prevuously Corona
Solar2D Free Plugin Directory
Solar2D Plugins Marketplace | Plugins & Templates for Solar2D
Solar2D Marketplace

Corona: Free Cross-Platform Game Engine

Cocos2d-x

Cocos2d-x - World's #1 Open-Source Game Development Platform
cocos2d Org

Cocos Creator

Cocos Creator - Efficient and lightweight cross-platform 3D/2D graphics engine

AtomicGameEngine

AtomicGameEngine/AtomicGameEngine: The Atomic Game Engine is a multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript

Home · AtomicGameEngine/AtomicGameEngine Wiki

Python

pygame

Top Python Game Engines – Real Python
9 Best Python Game Development Libraries/Frameworks [2023] - Geekflare

pymunk physics engine
FIFE
adventurelib - easy text adventures — adventurelib documentation
The Ren'Py Visual Novel Engine

Pygame physics simulation

Episode #2: Learn Python Skills While Creating Games – The Real Python Podcast

Arcade

The Python Arcade Library — Arcade documentation uses pyglet
Python Arcade Documentations
Program Arcade Games With Python And Pygame
Arcade: A Primer on the Python Game Framework – Real Python
How to create a 2D game with Python and the Arcade library | Opensource.com

cocos2d

cocos2d uses pyglet
cocos2d Programming Guide — cocos documentation
cocos package — cocos documentation

pyglet

Home — pyglet
pyglet/pyglet: pyglet is a cross-platform windowing and multimedia library for Python, for developing games and other visually rich applications.
pyglet Documentation

Steve Johnson - Pyglet Tutorial

Minecraft in 500 lines of Python with Pyglet
fogleman/Minecraft: Simple Minecraft-inspired program using Python and Pyglet
boskee/Minecraft: Simple Minecraft-inspired program using Python and Pyglet 1000 commits later

C Sharp

MonoGame
MonoGame/MonoGame: One framework for creating powerful cross-platform games.

Fully compatible with XNA
XNA Game Studio 4.0 Refresh | Microsoft Docs

PaulBlythe/Monogame-tools: Free tools for Monogame development

Zig

zig-lang#Gamedev

Go

Game Development - Awesome Go / Golang

Rust

Are we game yet? - Rust
The Rust Programming Language for Game Tooling - YouTube
Rust for Game Development -- Game Engines & Frameworks - YouTube
5 Rust game engines to consider for your next project - LogRocket Blog

Nannou
nannou-org/nannou: A Creative Coding Framework for Rust.

Piston - a modular open source game engine written in Rust

ggez: Rust game thing

Amethyst - The open source, data-driven game engine 😴inactive

Bevy

Bevy - A data-driven game engine built in Rust

Bevy 0.7 Released – GameFromScratch.com
Andreas Monitzer - Bevy-ECS explained - Rust Vienna June 2023 - YouTube

Fyrox

Fyrox engine originally rg3d
FyroxEngine/Fyrox: 3D and 2D game engine written in Rust

Fyrox Game Engine -- Rust Powered RG3D Renamed – GameFromScratch.com
mrDIMAS/rusty-shooter: [suspended] 3d shooter written in Rust using rg3d

Flutter

Flame Engine
Flutter 2.8 introduces 2D game engine and faster app performance

Qt

Bacon2D
Bacon2D/Bacon2D: Bacon2D is a framework to ease 2D game development, providing ready-to-use QML elements representing basic game entities needed by most of games.

Felgo Games Examples and Demos | Felgo Documentation

Larpon/DeadAscend: A 2D point'n'click-like adventure game written in Qt/QML and Javascript

Card Game

Generic Collectible Card Game

SFML

SFML C++
Simple and Fast Multimedia Library - Wikiwand

Sonkun/python-sfml: Official binding of SFML for Python
jeremyletang/rust-sfml: SFML bindings for Rust

Mario Game using SFML - YouTube

Panda3D

Panda3D - Free 3D Game Engine
Panda3D Manual — Panda3D Manual

Godot

Godot Engine - Free and open source 2D and 3D game engine
Godot: The open source game engine
Godot With C++ – GameFromScratch.com
C# Development with Godot and Visual Studio Code Tutorial

CardEngine | Braindead.bzh
Braindead.bzh | Game Dev Hobbyist
Tutorial – Gaming with Godot » Linux Magazine

Godot is not the new Unity - YouTube Godot is for hobbists

remove pre 4.0 articles

Godot 4.0 Is Out: Almost a Brand New Engine · GDQuest
The ultimate introduction to Godot 4 - YouTube 11:32:40
Godot UI Basics - how to build beautiful interfaces that work everywhere (Beginners) - YouTube

Godot For Unity Developers - YouTube

Learn to Make Games · GDQuest
GDQuest Demos
Getting started with Godot in 2021 · GDQuest Godot 3
Getting started with the Godot game engine in 2021 - YouTube
Godot 3 tutorials - YouTube
GDQuest - YouTube
Learn to Code From Zero with Godot
GDQuest/learn-gdscript: Learn Godot's GDScript programming language from zero, right in your browser, for free.

Godot Vs Unity: The Ultimate Game Engine Showdown - YouTube
Top 10 Reasons Why I Switched to Godot Game Engine - YouTube

Zenva
Godot Game Development Mini-Degree - YouTube
COMPLETE COURSE - Learn the GODOT Game Engine in 50 MINUTES - YouTube

KidsCanCode - YouTube
Godot 101: Beginner Lessons for Godot 3.1 - YouTube
kidscancode/godot_recipes: Lessons, tutorials, and guides for game development using the Godot game engine.

Game Endeavor - YouTube
Bastiaan Olij - YouTube
PlayWithFurcifer - YouTube
godot tutorials - YouTube Miziziziz

Goodgis - YouTube mostly on Godot

HeartBeast - YouTube

ursina

ursina engine

Creating Minecraft in Python [with the Ursina Engine] - YouTube
Creating a Minecraft style menu in Python [Ursina] - YouTube
clear-code-projects/Minecraft-in-Python: Project files for a tutorial on Minecraft in Python available here: https://youtu.be/DHSRaVeQxIk

Wicked Engine

Wicked Engine – 3D engine with modern graphics
WickedEngine C++ Open Source Game Engine – GameFromScratch.com

Flax

Flax - Flax Engine

Falco

Falco 3D Engine. 3D Engine. Game Engine.

FalcoEngine Hands-On – GameFromScratch.com 2021-03

AppGameKit

AppGameKit - AppGameKit is great for everyone free for Education and on RPi

openBOR

Chrono Crash - Index
DCurrent/openbor: OpenBOR is the ultimate 2D side scrolling engine for beat em' ups, shooters, and more!

openBOR Games You Need to Play - YouTube
OpenBOR Games List - Hyperspin - YouTube

neoGFX

neoGFX C++ Application/Game Engine and Development Platform
i42output/neoGFX: Cross-platform GPU-oriented C++ application/game framework

Leigh Johnston - YouTube

TIC-80

TIC-80 tiny computer

AAA Title Engines

Unity VS Unreal Engine 4 | Which Engine Is Right For You? - YouTube

Unity is better for 2D games; Unreal is better for FPS and multiplayer
Unreal's engine and features are more polished and coherent
Unreal is in C++ and the UI is less intuitive

GPUOpen

GPUOpen - GPUOpen

an AMD initiative designed to enable developers to create ground-breaking PC games, computer generated imagery and GPU computing applications for great performance and lifelike experiences using no cost and open development tools and software.