I'm a big fan of rhythm games, and I've been quite a big fan of PaRappa for a while - I played all the games and watched the anime (not to its fullest though!). So one day, I got curious enough to take a look at the PS2 sequel on Ghidra/IDA and got motivated to start a decompilation of PaRappa the Rapper 2 (PS2).It builds to a 1:1 matching ELF, and it's quite easy to set up (just make sure you can run i686 executables)! Ubuntu is recommended.
Make sure to check out the 'develop' branch - that's where most progress is made.
Thank you very much.