Defender is a scrolling shooter video game developed by Williams Electronics in 1980 and released for arcades in 1981. A side-scrolling shooter, the game is set on either an unnamed planet or city (depending on platform) where the player must defeat waves of invading aliens while protecting astronauts. Development was led by Eugene Jarvis, a pinball programmer at Williams; Defender was Jarvis’ first video game project and drew inspiration from Space Invaders and Asteroids. Defender was demonstrated in late 1980, before entering production in early 1981. It was distributed in Japan by Taito.
The macOS version is a port to Swift of the original 6809 Assembler Language source code and was done entirely using Claude Code. The Windows version is a port to C# from the macOS version, again done entirely with Claude Code.
This was done just for fun, from the publicly available source code. The downloads are completely free.
Note: The macOS version is Signed and Notarised by Apple.