The original Steam Deck has been around for a while, but unless you only play the heaviest games, it should be great for some time more.
I've used LLMs to decompile Civ 1 and put the reconstructed C source on GitHub, along with a technical book and story. The reconstructed source builds with what i'm pretty sure is the original Microsoft C compiler and toolchain. It produces a byte-for-byte match with the original executable, aside from a four-byte correction for what appears to be a patch applied after linking. So it should be pretty close to how the original game was made; although it can't be said that this is the "original source code". I've also used that source to create a modern build of the game, in the reciv reposit…