I had an inspiration on the Killing Floor (UT2004) mod that I anted to carry over to this game. And that idea was a new perk that I called Chembug. It is almost like Firebug except the player uses a chemicalthrower to kill specimens and unlock the perk.
It is WIP (work in progress)at the moment. A few kinks needed to be ironed out first. Updates of the new perk will be posted.