Microsoft’s faltering $69 billion bid to buy the video game company Activision Blizzard received a glimmer of hope on Monday when European Union regulators approved what would be the largest consumer tech deal in two decades.E.U. officials said they would allow the deal after Microsoft, the maker of the Xbox console, made concessions to ensure that rival companies of new online gaming services would have continued access to titles developed by Activision, such as the hugely popular Call of Duty.Even so, the blockbuster acquisition, which has become a test of whether regulators around the world will approve a tech megamerger amid concerns about the industry’s power, still faces an uphill climb. American and British regulators have each moved to stop the acquisition in recent months, arguing that a combination of the Xbox maker with the company behind the …
