Technische Maschinenfabrik have developed a Commodore 64 conversion of Atlantis, the classic early 80s shooter, which was released on the likes of Atari 2600 and VIC-20. The game involves the player defending the city of Atlantis against the onslaught of invaders by using a handful of fixed cannons on the city's grounds. The game can be downloaded for free from the CSDb website.