Garoudan by nevat is a game close to Choplitfer, but your aim is not to save humans, the aim is to kill ’em all. The game is work in progress and there is no binary to download yet.

Garoudan (Genesis/Megadrive Game)

Garoudan Megadrive/Genesis WIP #1

http://gendev.spritesmind.net/forum/viewtopic.php?f=8&t=2139