I have to admit, as much as I want to praise this game, it is mostly wasted potential.  Even though this game came out in the later stage of the N64's run, it has the graphics of a third party release title. (Read: They're not all that great.)  Everything about the game reaches towards high concepts, but almost nothing reaches its goal.  The idea is that you are a timetraveling hero who has to save the world from various attacks from interstellar insects throughout history.  While the story is pure fluff, the gameplay (at least in theory) is not.  DMA is well known for the Grand Theft Auto series of games, and Body Harvest follows a similar formula.  You shoot things, then you get into various vehicles and shoot more things.  The main difference is that in Body Harvest you don't want to run innocent people over.