Robert Hurst has released a Commodore VIC-20 version of the classic Atari classic game BREAKOUT. The game is written machine language and requires a VIC-20 with a 8 kByte RAM expansion. You can play the game with a paddle but it can also be played with a joystick (auto-detection). The game has also a two player mode. You can read more about the game on the Denial web page.