Syphon filter game for ps1?

Question

is that the 2 player game where theres alot of characters and places to choose from and in the game theres magnum guns and bombs you can get to kill the other player?

also is that the one where theres a rooftop area

Answer 1

I have it, I dont believe its 2 player though.  Its the hardest game I probably have ever played. I havent played it in years, Im not good enough to beat it.  

Answer 2

Syphon Filter is a series, but yes 2 and 3 do have two player vs mode.

Yes one of the locations is on rooftops.