Infested!

From publisher blurb: Infestation is the second in a series of one page adventures by Sacrosanct Games. They are designed with the following goals in mind: Meant to be one-off sessions whenever something comes up that you can't do your main campaign generic in listed stats to be compatible with most versions of the most popular RPG with little conversion needed. a quick, low prep adventure for whenever the desire to game grabs you keep it to only one page in length for ease of use and printing