Cast your minds back about 10+ years when the amiga's were hot.
There was a 3d game very plain where you controlled a character who was made of polygons, it was set in a big field with buildings and water, you could collect and fire weapons, ride cars , bikes and helicopters...
Im dying to find out its name because i cant remember but it was my fav game of all time on the amiga...
Unfortunatly i dont have any more info then that so if you do use an emulator for the amiga games and recognize it please please please let me know....

IF it helps there was a command you could type in to get cheat mode which made you fly..