Super Mario 64 Multiplayer

Super Mario 64 Multiplayer is a browser port of Super Mario 64 by Oliver Sauter (@olivers_tools). XDA reports that it is built on sm64ex, a fork of sm64-port, with the sm64coopdx co-op mod added, and that the entire game runs in the browser, every level included.

How to play

• Open the play page and load a ROM from your own copy of the game.
• Start a single-player or a multiplayer game. In multiplayer you can start with every level open, or play the classic way and collect stars to unlock stages.
• Playable characters include Mario, Luigi, Toad, Wario, Yoshi, Donkey Kong and Bowser Jr.

What you need

• A Super Mario 64 ROM from your own copy.
• A browser. XDA says the game also runs on phones; the control scheme there isn't documented.

Good to know

• Multiplayer takes up to 12 players and has in-game voice and video chat.
• The multiplayer version adds a few unusual mods, such as a machine gun.
• XDA reports that the project was made with the help of AI.