Sprite Fusion Tile Attributes, Colyseus Holyjam 2025, and GDevelop 5.6 with 3D editor

Articles

WebGPU is now supported in major browsers
This significant milestone results from years of extensive collaborative development by the W3C GPU for the Web Working Group, with contributions from companies including Apple, Google, Intel, Microsoft, and Mozilla.
François Beaufort at WebDev

Codex, Opus, Gemini try to build Counter Strike
In the last week we’ve had three major model updates: Gemini 3 Pro, Codex Max 5.1, Claude Opus 4.5. We thought we’d give them a challenge.
Stepan Parunashvili at Instant

Steam Machine today, Steam Phones tomorrow
In an exclusive interview, Valve reveals it’s the architect behind a push to bring Windows games to Arm.
Sean Hollister at The Verge

Tutorials

Sprite Fusion Tile Attributes
Tile attributes let you attach custom JSON data to any tile in your SpriteFusion map. Think of it as adding metadata that travels with your tiles.
Justin Young at Excalibur.js

Competitions

Colyseus Holyjam 2025 (December 8th - 31st)
Colyseus Holyjam 2025 is a cozy, low-pressure game jam where you create a multiplayer game using the power of Colyseus during the holidays.

Playgama X-Mas Things Jam (December 12th - 21st)

thatgamejam #01 (December 20th - January 4th)

Tools

GDevelop 5.6: real-time 3D editor now available

Resources

Advent of Joy 2025

Demos

Sphere of squares

Instanced emissive

Dweet of the week: satisfying fractal

Games

Nebulite