Roughly 2.5 billion people around the world regularly play video games. While you probably shouldn't sneak off to play Fortnite during work hours, in the future your job might include a gamified component that rewards you - whether you need to exceed sales goals, launch products on time, or close several service requests per day.

Gamification is nothing new when it comes to consumer brands (think Cracker Jack prizes and loyalty reward programs). But companies specializing in gamification for specific job functions from cybersecurity to sales are raising money and entering new markets to help improve employee engagement.