Also, I'd imagine you'd want the Ztso extension to port PC games, assuming you mean Rosetta-style instruction translation rather than "somehow get the source and port the engine and all the middleware" -- I don't think the P550 has that extension.
A rv64 port on a rv64 elf/linux (using the rv64 glibc) with the AMD mesa drivers. That will reveal where certainly a lot of work will have to be done, and that at all levels.
And better do that with many AAA games (the nasty and badly coded ones, probably many of them).
Better try to do that work before getting access to the latest silicon process.