What would the feasibilty be to make a game based around laser-quest (where you run around a darkened dungeon-eque location firing laser beams at receivers to knock your opponent out)? Any thoughts?

What?

If you're asking whether a game based on running and shooting in the dark will be playable, then the answer should be self-evident. I think that's a whole genre, actually.

What aspects of this idea have you worried enough to ask about it here? Are all the characters ponies? Can you actually see nothing (that would lower the system requirements, but gamplay would be tough to salvage)?