Microsoft’s uphill battle to buy Activision Blizzard

It's not "game over" yet for Microsoft's quest to buy the video game maker Activision Blizzard, but the software giant is starting to run out of clear pathways to complete its $69 billion takeover.

A major setback came on April 26 when British antitrust regulators said they would block the acquisition.

Microsoft and Activision have vowed to appeal, but the deal also faces legal challenges in other parts of the world.

It's been more than 15 months since Microsoft, owner of the Xbox gaming system, first revealed its plans to buy the publisher of popular game franchises like Call of Duty, World of Warcraft and Candy Crush.

But there's no end in sight.

The deal awaits an important May decision from antitrust regulators representing the 27-nation European Union.

It must also undergo an August trial in the U.S. before an administrative judge at the Federal Trade Commission.

A former FTC official says the U.K. decision could be a deal-breaker.

"If this were a smaller jurisdiction with a tiny population, the companies could shrug and say, 'We just won't do business there,'" said former FTC Chair William Kovacic.

"They can't do that very effectively with the United Kingdom. So a U.K. decision to block is basically a global decision to block the transaction."

The deal won approval March 28 in Japan, a hub for game development and the home of both Sony and Nintendo. It's also been approved in Brazil, South Africa and some smaller markets.

It was the small but growing cloud gaming market, not the existing console rivalry between Xbox and Sony, that the Competition and Markets Authority said it was concerned about.

Streaming games to tablets, phones and other devices has freed players from...