I'd love any kind of fic that implemented some of the game mechanics, battle-styles and weaponry within the story itself. Something in particular I was thinking of was something like... You know how in the game the Sniper's will mostly be left alone in their nest, but every now and then a Pyro will pop by to do some spychecking? Something like that, but played up for the naughties, perhaps the Sniper getting caught in the act or something else?