Definition of "unlockable" []

• Not capable of being locked. (adjective)
• Capable of being unlocked. (adjective)
• An initially hidden feature that is unlocked to reward the player for some achievement. (noun)

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• "Bird and Bean ($2), a game that was an unlockable from the WareWare Inc. game for the Gamecube, but still kinda fun."
• "Since the game is still rough around edges, the developer has not yet confirmed if some planned features will make it into the 1.0 version, namely unlockable achievements, the ability to control your iPod music from within the game, and OpenFeint support for online high scores and achievements."
• "Tekken Director Katsuhiro Harada has said that the idea of unlockable characters is outdated."