The best instinct is the free Killer Instinct

Microsoft is giving away unlock codes for Killer Instinct to select individuals. The code emails are going out to Xbox Live members based on a combination of factors such as overall Gamerscore, community involvement, and Xbox Live tenure.

“We wouldn’t be here without you, and we know you’ll do amazing things on Xbox One. Thank you from Xbox Live.”

The codes unlock all the characters for Killer Instinct on the Xbox One, which would normally cost $19.99 for the bundle. The game will be free-to-play with Jago unlocked for everyone at the start.