(2) if the work is a sound recording, two complete phonorecords of the best edition, together with any printed or other visually perceptible material published with such phonorecords.
Neither the deposit requirements of this subsection nor the acquisition provisions of subsection (e) are conditions of copyright protection.
(b) The required copies or phonorecords shall be deposited in the Copyright Office for the use or disposition of the Library of Congress.
Mandatory deposit is already required for copyright registration, and this includes video games.