Anyone who's played this game can attest how unique this game is, considering it's uber cool graphics using pseudo 3-D sprites.  Add in a ridiculous level of difficulty, Viewpoint offers a tremendous amount of replay value.  Good luck completing this game without a memory card.  You'll need one and a partner to help you through all the missions (2-player simultaneous is possible with a Unibios Chip). 

 

The Japanese version is much rarer than it's English counterpart.