# Nintendo Entertainment System games beginning with O
       
 (DIR) oeka-kids-anpanman-no-hiragana-daisuki
 (DIR) oeka-kids-anpanman-to-oekaki-shiyou
 (DIR) oishinbo-kyukyoku-no-menu-3bon-syoubu
 (DIR) okkotoshi-puzzle-tonjan
 (DIR) olympic-iq
 (DIR) onyanko-town
 (DIR) operation-secret-storm
 (DIR) operation-wolf
 (DIR) orb-3-d
 (DIR) osomatsu-kun-back-to-the-me-no-deppa-no-maki
 (DIR) otaku-no-seiza-an-adventure-in-the-otaku-galaxy
 (DIR) othello
 (DIR) othello-hes
 (DIR) outlanders
 (DIR) over-horizon
 (DIR) overlord
       
 (DIR) All platforms