Keywords Studios, the Irish video game services firm subject to a €2.5 billion takeover offer, is facing another round of labour disputes. Workers at one of its studios have joined the strike action of Sag-Aftra, which is representing video game actors. Meanwhile, lay-offs at some of its European operations have drawn criticisms from unions. Sag-Aftra, the union best known for representing Hollywood actors, has called a strike among the interactive media and video game workers in its ranks. The dispute stems from negotiations over an agreement that have been rumbling on for a year and a half. Several major studios,…