Part of "MotorStorm: Apocalypse (The First Playable Internal Prototype)"
-> https://hiddenpalace.org/MotorStorm:_Apocalypse_(The_First_Playable_Internal_Prototype)
MotorStorm_3_The_First_Playable_PKG.7z - EP9000-NPEA00484_00-MOTORSTORM3FPM00.pkg

.self file inside .psarc