Secret Weapon (atari st) - completed 

3D Construction Kit game (public domain)
A mysterious virus was cast on the city. Nobody in the streets, at least looks so, until you start seeing frozen (dead?) bodies here and there. What has happened? And who did that?
Try to investigate and get some clues. And find a way to drive that train..
Ah yes, the gardener doesn't like when you smash its flowers, but i mean, he really doesn't
(played at 16mhz)