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

And it even has touch controls.
XDA Developers on MSN

Google DeepMind's design leader used Claude Fable 5 to port Command and Conquer: Generals Zero Hour to iPhone and Mac

It's native, too.

Google executive ports Command & Conquer Generals: Zero Hour to iPhone and Mac using Claude

A Google executive used Claude Fable 5 to port Command & Conquer Generals Zero Hour to iPhone, iPad, and Mac without using an ...