I still have the source code for a DOS game I wrote around 1990/1991. I still have a few executable files and I've got all the code and the assets but I don't have the toolchain anymore and I don't have the build script neither. I don't remember which compiler I was using. So basically I've got no clue as to how to build it.

But a blog like this surely makes me want to bring it back to life at some point!