These files are typically found on community sites like Reddit's r/pkglinks or specialized gaming forums where users share "fake packages" (FPKGs) for homebrew-enabled consoles.
In this context, the term "paper" is likely a colloquialism or a mislabeling of the file in the forum or site where you found it. Aeterna.Noctis_CUSA32236_v1.02_BACKPORT_[5.05-6...
: A challenging 2D Metroidvania game known for its high difficulty and platforming. These files are typically found on community sites