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The term unlockable games refers to full video games that can be unlocked within another video game, often as easter eggs. Often these unlockable games are earlier entries in the series of the game in which they are hidden, and they become available after beating the game or meeting other requirements. ==Examples== * ''Animal Crossing'' features nineteen unlockable Nintendo Entertainment System games. * ''Castlevania: The Dracula X Chronicles'' contains the original version of ''Castlevania: Rondo of Blood'' and ''Castlevania: Symphony of the Night''. * The PC game ''Maniac Mansion: Day of the Tentacle'' by LucasArts included its predecessor ''Maniac Mansion''. * In the Sega Saturn release of ''Duke Nukem 3D'', ''Death Tank Zwei'' can be unlocked either by shooting every toilet in the game or by having a save file from another game by Lobotomy Software. * In ''Donkey Kong 64'', the games ''Jetpac'' and ''Donkey Kong'' can be unlocked. * In several ''Grand Theft Auto'' games, various arcade games can be unlocked by finding their arcade machines. * In ''House of the Dead III'' for Xbox, ''House of the Dead 2'' can be unlocked by beating the game. * ''Metroid'' was an unlockable in two different games: it could be unlocked by finishing ''Metroid Fusion'' and connecting it to ''Metroid Prime'' with the Nintendo GameCube Game Boy Advance Cable, and in ''Metroid: Zero Mission'' it becomes available after beating the game. * In ''Mortal Kombat: Shaolin Monks'', it is possible to unlock ''Mortal Kombat 2'' by either completing the story mode with Smoke or by entering a cheat code at the menu. * The PlayStation 2 version of ''NHL 06'' includes ''NHL 94''. * ''Ninja Gaiden (Xbox)'' contains the first three ''Ninja Gaiden'' games for the Nintendo Entertainment System ported from the rare ''Ninja Gaiden Trilogy'' compilation for the Super Nintendo, while the ''Black'' re-release on the same system has the first game's arcade counterpart instead. * In ''Pac-Man World 2'', players can unlock the following four Pac-Man games by collecting tokens: ''Pac-Man'', ''Ms. Pac-Man'', ''Pac-Attack'', and ''Pac-Mania''. * In ''Pitfall: The Mayan Adventure'', you can unlock the ''Pitfall!''. * In ''Project Gotham Racing 2'', ''Geometry Wars'' is unlocked by entering the garage, entering walk mode, walking to an arcade machine, and pressing A. * In ''Prince of Persia: Sands of Time'', players can unlock ''Prince of Persia''. In the Xbox release, ''Prince of Persia 2'' is also unlockable. * In ''Return to Castle Wolfenstein'', ''Wolfenstein 3D'' is unlocked after the player completes the game. * ''Shenmue'' on the Dreamcast contained the arcade games ''Hang-On'' and ''Space Harrier'', which could be unlocked by walking into the arcade and using in-game money to play. * In ''Sonic Adventure DX: Director's Cut'', players can unlock 12 Sega Game Gear games: ''Sonic the Hedgehog'', ''Sonic Drift'', ''Sonic Chaos'', ''Sonic Spinball'', ''Sonic Labyrinth'', ''Sonic the Hedgehog 2'', ''Dr. Robotnik's Mean Bean Machine'', ''Sonic Triple Trouble'', ''Sonic Drift 2'', ''Tails' Skypatrol'', ''Sonic Blast'', and ''Tails Adventure''. * In ''Sonic Mega Collection'', players can unlock five games by playing a certain number of times: ''Blue Sphere'', ''Sonic & Knuckles (Sonic the Hedgehog 2)'', ''Sonic & Knuckles (Sonic the Hedgehog 3)'', ''Ristar'', and ''Flicky''. * In ''Star Wars Rogue Squadron III: Rebel Strike'', ''Star Wars'', ''The Empire Strikes Back'' and ''Return of the Jedi'' can be unlocked. * ''Super Smash Bros. Brawl'' has a feature that allows the player to play demos of the characters' games of origin, but the demos have a strict time limit, after which you are returned to the menu. * ''Teenage Mutant Ninja Turtles 2: Battle Nexus'' features ''Teenage Mutant Ninja Turtles: The Arcade Game'', and ''Teenage Mutant Ninja Turtles 3: Mutant Nightmare'' features ''Teenage Mutant Ninja Turtles: Turtles in Time''. * ''Tekken 5'' includes the first three ''Tekken'' games and ''StarBlade''. * In ''Terminator 3: Rise Of The Machines'', versions of ''Centipede'' and ''Missile Command'' can be unlocked by finding their arcade machines in the game's levels. * In ''Call of Duty: Black Ops'', ''Zork I'' can be unlocked by typing "Zork" into an old computer at the menu. * In ''Splatterhouse (2010 video game)'', you can unlock the first three games. * In ''Super Mario Bros. Deluxe'' you can unlock ''Super Mario Bros.: The Lost Levels'' by beating Luigi's high score 300.000 in the original mode. * In ''Sonic Generations'' Sonic the Hedgehog (1991 video game) can be unlocked in the game. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Unlockable game」の詳細全文を読む スポンサード リンク
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