I made blaster rifles that shot destructions, but never realized you could shoot map features. That sounds like the potential for interesting fps: remake the map as you go.
Someone should do a mod of that, based on characters from the old A-Team TV show, complete with the original theme music. The "build defenses" interval would be like the build weapons montage.
In 1999 the Wheel Of Time game with it's Citadel mode was an early example of this. The original design was much more open-ended -- production realities meant that the end result was CTF with a 2 minute period at the start to setup traps in your home base.
It's a shame the Wheel of Time game didn't become more popular. Even with the limited implementation of the Citadel mode, I still haven't seen anything like the combination of strategy and FPS action that you get when duelling. Tremulous comes pretty close when it comes to strategy when building stuff in team matches, though.
