Co-op enthusiasts who were playing games back in the early 90s may remember a title by the name of Super Buster Bros (or Super Pang, depending on whence you hail). The catch to this shooter was that players could only fire up. Rainer Zoettl and Till Aschwanden, two former Blizzard employers, are looking to revive this particular form of shooting things with the forthcoming The Bug Butcher.