I cannot describe how bad the game design is in Opposing Force. I mean come on, the level design is atrocious. The AI also leaves much to be desired. In addition to that, the only positive aspect of Opposing Force is the weapon variety, and even that could be described as complete garbage filler. Blue Shift had less, but at least I could actually enjoy it. If you enjoy Opposing Force, it is obvious that you're incapable of basic mathematics and thought comprehension, just like the marine you play as in the game.