Probably the only competitive FPS (or even video game) for Nintendo 64. I mean, the only great and hard FPS for this console: Quake. Probably the best game ever made. I've already written a review for the PC version.
Despite its flaws, Nintendo 64 owners looking for the Quake experience can't go wrong with this game -- if for single-player mode alone. However, seasoned Quakers looking for the ultimate multiplayer game may want to rent before they buy.