It seems like engineers are vibe coding game ports with access to the source code

And it even has touch controls.

Now You Can Play Half-Life 2 in a Web Browser

Half-Life 2 is one of the greatest videogames in history, a technological tour de force at the time of its release in 2004.
Tom's Hardware on MSN

Half-Life 2 can now run in your browser at over 100 FPS with save states & console support

It's not Half-Life 3 but it's something.
GitHub

An Open-source Drug Discovery Engine

OpenDDE is a preview release. CLI flags, input/output JSON fields, and released checkpoints may change between versions, and predictions are not guaranteed to be reproducible across releases. It is ...