Monster is doing a giveaway for halo 5, and maybe you'll even win a brand new, xbox series X
1. Go to this link: https://earnrewards.com/monsterhalo?redirect=%2Fmonsterhalo%2Fpending_account
2. Log in or register
3. Scroll to the bottom
4. Click "Redeem Free Download"
5. The code will be in your email.
Note: This is US only, and some people are experiencing account issues, let me know in the comments if you are experiencing account issues.