oech3 [1] filed a deletion request for rpcs3-bin [2]: Upstream does not allow to push stable release: https://aur.archlinux.org/packages/rpcs3#comment-1011724 and rpcs3-latest-bin exists.
AUR/rpcs3 is barely possible by #tag= but upstream does not provide official method to find prebuilt of stable binary. [1] https://aur.archlinux.org/account/oech3/ [2] https://aur.archlinux.org/pkgbase/rpcs3-bin/
