OpenGothic

Yes! And there are many other re-implementation projects, like OpenMW, OpenGothic, fheroes2, and others, which allow you to play the games if you can provide the original assets. Largely for older games, but the point stands. https://openmw.org/ https://github.com/Try/OpenGothic https://ihhub.github.io/fheroes2/

I hope that one day we have a tool that can convert any proprietary binary to source code with a single click. It would be so much fun to have an "open source" version of all games. Currently, there are projects like https://github.com/Try/OpenGothic and https://github.com/SFTtech/openage, but these require years of community effort.

DirectMusic[1] is a deprecated Windows API for playing dynamic music scores authored using DirectMusic Producer[2]. It was originally released as part of DirectX in 1999 and discontinued with the release in Windows Vista around 2009-ish. Due to my involvement with projects[3] re-implementing an old game engine for the early 2000's games Gothic and Gothic II[4], I came to notice that existing solutions[5] were incorrect and hard to use. Thus, I was tasked with writing a new, correct re-implementation of the API. Today, my re-implementation is able to (mostly) play back so-called style-based segments[6] and is fully tested against both the Gothic and Gothic II soundtracks. I am actively working on getting the Lego Island 2 soundtrack working as well. There are many features of DirectMusic which the library does not currently support, simply

The development has come to a (temporary?) halt right now, the bs::framework we were using encountered some issues right after we adopted it... Hopefully we'll be able to resume some time in the future! In the meantime, https://github.com/Try/OpenGothic is more feature-rich. (Disclaimer: I worked on the project but I am not the maintainer nor am I any kind of leader figure in the dev team)