Enlarge / Striking employees demand the reinstatement of Raven Software QA contractors who were let go in December. (credit: A Better ABK) The members of Activision Blizzard subsidiary Raven Software's quality assurance department are seeking voluntary recognition of their union, a first for workers at a major American video game publisher. The newly formed Game Workers Alliance union is asking Activision to recognize its right to represent the 34 QA testers at the studio, which works primarily on the Call of Duty series.