Penguin Adventure (夢大陸アドベンチャー Yume Tairiku adobenchā?, lit. "Dream Continent Adventure") is an action-adventure platform game released by Konami in 1986. It is a sequel to Antarctic Adventure and has the distinction of being the first game that Hideo Kojima ever worked on.
During the briefing for the second act of Metal Gear Solid 4: Guns of the Patriots, Sunny can be seen playing Penguin Adventure on her PlayStation Portable. If the player gets close enough with the Metal Gear Mk. II, music from the game can be heard.