the doom shotgun is and will always be the most satisfying and well balanced weapon in all videogame history, if you argue you havent played doom and are a homosexual
there are so many gimmicky weapons its hard to really see those that rate above and beyond, obviously the grav gun is one of those but triple shoot in contra WTF, if you want to be that tenuous side scrollers like r-type, killing everything on the screen by pressing fire has got to count for something
anway serious sam has a wep in it that fired fricking 10ft wide cannonballs that flattened everything, thats gotta be worth something