Microsoft’s Kevin Gammill, general manager of Gaming Developer Experiences, called Epic’s Unreal Engine “critical technology” in a filing at the weekend [PDF] in support of Epic’s motion for a temporary restraining order to prevent Apple from terminating its developer account. Referring to the statement, Xbox supremo Phil Spencer tweeted yesterday to say “ensuring that Epic Read more about Microsoft sides with Epic over Apple developer ban, supports motion for temporary restraining order[…]