Do you remember this game? I was talking to my friend today and asked him about it and surprisingly he remembered, which led us to try to download it. I didn’t expect to find it as freeware really. Although I didn’t really play versions 1-3 I surely remember 4 and 6 (specially 4).
This is the link if anybody is interested:
Notice that you will have to download a DOS emulator in order to install/run it on Windows XP/Vista/7.