For a super early cover shooter, the mechanics are surprisingly similar to modern games., with things like peeking out of cover, being able to roll between cover (this has to be done manually using the weird crouch roll that's in the game and isn't a simple button prompt like more recent shooters), or even losing leftover ammunition when you reload, although that only applies to the assault rife. There are some janky parts to it like explosion radiuses being hard to tell or only being able to aim/shoot while standing in place a-la Resident Evil due to the N64's one control stick, but it worked pretty well since the game was designed around the control limitations. The story was pretty bland, but maybe that's more due to the lack of voice acting than the quality of the writing. Granted this is the game where the true final boss just kills the normal final boss then fights you without saying anything, so maybe the story does kind of suck.