[fidepus] put together a pretty nifty version of the game Space Invaders. This is an analog version that involves an ink and paper based display system.

He printed out one piece of paper for each different enemy, mother ship, laser beam, and player vehicle. The human-based controller is used to move the pieces in all directions. When it comes time for a row to move downward, the pieces are removed from the game grid and relocated to their new position using a scotch-tape-actuator.

We think the most successful part of this hack was [fidepus’] ability to integrate sound effects into the controller system. The human-based controller puts out mono sound with a “pew-pew” for laser blasts and a “dirnk-dirnk… dirnk-dirnk” for the enemy movements.

Although there is no code nor a schematic provided, we think this system shouldn’t be too hard to reverse engineer.