I always enjoyed the first time I played this brilliant game
Check this link for gameplay movie
[ Show youtube player ]
This was like GTA on the N64. Huge areas to freely explore, plenty of cool vehicles to drive and loads of bugs to blast! It's a crime that DMA did not produce a sequel. If you have a PS2 then I recommend you try this game which is a modern update of Body Harvest
This is a cool shoot'em up!