Perfect Dark was great for that too, with the tranq darts, and the laptop gun. I remember having so much fun with friends as we figured out the most rage-inducing ways tomabuse the laptop gun emplacements. Duke Nukem 3D was fantastic as well, with the pipe bombs and laser tripwires.

God I miss weird, fun weapons in the days before every shooter played the same, and had to be balanced to sub-micron specifications.