GameDev.net
GameDev.net
Long-running game development community with forums, member blogs, tutorials and articles on programming, graphics, physics, art, audio and design, where developers can ask technical questions, study worked techniques and follow discussion of how games are built.
More resources on 2D Game Development
Kenney.nl
Library of thousands of free CC0 game assets, including 2D sprites, tilesets, UI elements, fonts and sound effects, released by the Dutch studio Kenney, letting learners prototype and ship 2D games without drawing art or worrying about licensing.
OpenGameArt.org
Community-run repository of freely licensed game art and audio, with 2D sprites, tilesets, backgrounds, music and sound effects searchable by license (CC0, CC-BY, GPL), so developers can find placeholder or final assets and understand the attribution each license requires.
Unity Learn 2D Pathways
Unity's official free learning platform, filtered to 2D content: guided pathways, projects and tutorials covering sprites, tilemaps, 2D physics, animation and C# scripting, taking a beginner from installing the Unity Editor to building and publishing a small 2D game.
Your first 2D game
Create your first 2D game with Godot Engine! This beginner-friendly course guides you through the basics of 2D game development.
Godot Documentation
Official manual for the Godot engine: scenes and nodes, GDScript, the 3D renderer, physics, animation, and export pipelines, plus a full class reference. Step-by-step getting-started projects take you from installation to a shipped build.
godotengine.org
Official website for the Godot game engine, offering downloads for the latest Godot versions, extensive documentation, and tutorials. It also features news, API references, examples, and community/contribution resources.