The year is 2052 and the world is a dangerous and chaotic place. Terrorists operate openly, killing thousands; drugs, disease and pollution kill even more. The world’s economies are close to collapse and the gap between the insanely wealthy and the desperately poor grows ever wider. Worst of all, an ages-old conspiracy bent on world domination has decided that the time is right to emerge from the shadows and take control.
I still have alot of the level layouts burnt into my memory. Several very memorable places you can line the walls with grenades and trivialise MIB ambushes ahead of time :).
Very few games really allow you to build a character that ranges from practically undetectable to rocket launching robot chewing monster in quite the same way, and most of those are its sequels