Akio Ōtsuka
The character appears in his Old Snake form as a playable character in ', a stand-alone expansion to the "Portable Ops" focusing on online play. In ', the VR Missions DLC add-on for the game's Japanese version includes a new weapon that can be used by Raiden known as the "Hebidamashi", a talking wooden sword which speaks with Solid Snake's voice (as portrayed by Akio Ōtsuka); the weapon was never made available for the English version.