Candy Crush

In a flat year overall for stocks, there was still plenty of excitement to be enjoyed—or endured—by 2015’s biggest winners and losers.

The company behind the hugely successful “Call of Duty” has struck a $5.9 billion deal to buy the makers of the highly addictive “Candy Crush” and take advantage of the way video games are moving out of living rooms and onto smartphones and tablets.

Microsoft has landed another key app in its Windows Phone Store today with the addition of Candy Crush Saga. The game, which has grown in popularity over the last two years or so, has a huge following and millions of players.