painkiller: overdose is a stand-alone expansion pack for the first-person shooter video game "painkiller", developed by mindware studios. mindware originally intended it to be fan-made mod but the publisher dreamcatcher interactive granted the project full financial and technical support, and officially published it in 2007. the expansion offers 40 types of monsters, 16 additional levels, and six additional weapons. it is the second expansion of "painkiller" with the first being