The game was such a failure, with only 2,000 units produced, that its rights were reverted to its creator. At present, it is one of the games that is freely and legally available for download to use with the M.A.M.E. emulator.
This game provides examples of
- Distressed Dude: Your three friends.
- Endless Game: You play until you run out of lives.
- Expy: Robby resembles a red Pac-Man with a miner's helmet.
- Invincibility Power-Up: The Magic button gives Robby a few moments of invulnerability that can only be used once per stage.
- Maze Game: Similar to Dig Dug.
- One-Hit Point Wonder: Robby Roto.
- Protection Mission: You must protect your friends from being recaptured once you find them.
- Scoring Points: For rescuing hostages as well as collecting treasure.
- Tunnel King: Robby Roto.