Xbox Game Pass Ultimate combines Xbox Game Pass for consoles, Xbox Game Pass for PC, and Xbox Live Gold into one complete package. There are rumors that it will also include access to "Project xCloud" game streaming when it's available later this year, but that hasn't been confirmed yet.

Right now, there's a promotion going on that can allows you to get three months of Xbox Game Pass Ultimate for just $15 on Best Buy. Considering that the $1 upgrade from Microsoft is over, this is the next best option. Keep in mind that this deal is limited to one code per customer.

If you don't purchase this, then you'll have to pay $15 a month for the service through the company. In a few months when retailers like Amazon offer discounts on Xbox Game Pass Ultimate, you should stock up so you don't have to pay $15 a month.