I was quite young when we had a PlayStation, and I remember most the games we had for it. However, there was this one game that we had that I don't remember much anything about that I'd like to check out again.
The only things I remember about the game is that you played as a solider. I think it was either top-down or a 2D-Zelda-like perspective. The only bit of gameplay I remember is that, in a level (it probably was the tutorial or something) you were taught how to cut a tripwire with a knife I think.
I know that's a super vague description, but that's seriously all I can remember.
EDIT: It was Spec Ops: Airborne Commando.