That's looks really neat. I might give this game a try, if I can get my hands on it.
I'm guessing you mean this in a negative manner despite calling it an "embarrassment of riches"? I doubt they're particularly easy to program. It's just that first person shooters is the most popular genre right now, so there are more of them than any other genre -- meaning there are also a lot more bad ones than any other genre.
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