GameTap has announced that three more games, Blow Out, Carrier Air Wing, and Perimeter, have been added to its network's massive library of current and classic console, arcade, PC and original titles. Also, the stealth-action game Thief: Deadly Shadows is now available for free play. In related news, to celebrate the fact that the Commodore 64 turns 25 years old this month, GameTap will be offering a selection of 10 C64 games for free play during December.