Sega Ages 2500 シリーズ Vol. 23: セガ メモリアルセレクション/ Sega Ages 2500 Vol. 23: Sega Memorial Selection

This game is a compilation containing five early Sega arcade games, including 1979's Head On. Each have been given significant graphical and audio upgrades (though emulated versions of the originals are also selectable). There are also various scans of flyers and other promotional material. The game was brought to the Japanese PlayStation Network service as part of the PlayStation 2 Classics range in October 2012. This version is simply known as Sega Memorial Selection.