What are liberated games?
Maybe, while surfing on abandonware websites, you came across this awkward definition. What is a liberated game? It's a game originally released as a commercial product and no longer sold; sometimes the developer (or the publisher) re-release the game with a freeware license, hence the term "liberated".
Usually, a game becomes liberated in an attempt to create hype and gather the interest of people towards an upcoming sequel (for example, the BattleCruiser series or The Elder Scrolls: Arena).
Sometimes the liberated game is so old that the developer, no longer interested in making money out of it, makes both the game and the source code available (for example: Allegiance, now maintained by fans).