Help to find a game.

Okay, so I'm looking for a game for PSX where I can play red spider robot, but I don't remember the name of game.So the gameplay is most of shooting enemies (enemies are like a somekind terrorists and the boss in this demo was a big robot) and you can walk like walls and roofs. I only played a demo of this game which I borrowed from my old friend years ago.So I hope somebody knows this game and name of it.

I am pretty sure i know the game you are talking about.Try Ghost in the Shell

Thanks, that was correct.