http://www.pcgamer.com/destiny-2s-ghost-skill-for-amazon-alexa-lets-you-yell-at-your-floating-companion-for-real/

Alexa is Amazon's "intelligent personal assistant" that runs through its voice-activated Echo devices. Basically, it works like this: 

And if that makes you think, boy, what that really needs is a tie-in to a massively successful yet vaguely disappointing videogame, then you'll be thrilled to hear about the new Destiny 2 Ghost Skill for Alexa, "giving players of one of the best-selling video games of 2017 to date the first-ever Alexa voice integration in a live game experience."