Maybe the medic bioweapon??
I really don't understand why video games haven't incorporated portable CNBR weaponry. I know, Modern Warfare 2 had Nova gas, Homefront even has White Phosphorous, and we're all aware of Bad Company 2's super-EMP bomb. Too flashy. I'm not killing for show, I want lethality! I want cutthroat realism! I want smallpox blankets for my enemy!!
And I don't want any bs about the Geneva Convention. What's more peaceful than infecting one guy with Leprosy, then leaving, quarantining the area, and come back in two weeks to bag corpses? I'm thinking about the children here. The 9 year olds who get any video game they ask for. They don't revel in blood and watch people bleed out for simple experience points. Teach them the finer points of war, not the brutality of headshots and throwing back enemy grenades.
Save the children! Tuberculosis, not guns!