I originally wrote Zombinanza as a silly entry into a Halloween contest. It’s written in C using the Win32 API. There is a little bit of DirectX and FLTK in there as well if I recall correctly. It was actually partly inspired by an old Windows 3.1 game called Blob Factory. It features 25 levels with multiple different level types. My favorite were the computer-inspired levels.
Link: Zombinanza
When: Circa 2005