This challenge runs from June 11th to July 2nd at 10am PDT. It will expire after that time.
You will unlock the Studios Horde Challenge after finishing 200 waves of any type of Horde on Normal difficulty or above. These do not have to be consecutive waves. Just a total of 200 total waves successfully finished.
You can track your current progress in the same spot as the achievements on the Xbox guide.
I would suggest to work on the newly released achievements below while the challenge is available to knock out 2 birds with one stone.
The The Perfect Run achievement in Gears of War 4 worth 378 pointsComplete a 25 or 50 wave variant of Private Horde on Insane with zero team deaths
If you are having troubles finding matches searching by yourself (due to locale), you may want to partner up with other gamers from North America to speed up the process. LFG (Looking for group) on Xbox is an alternative to finding like-minded players.
In addition to unlocking the challenge you will also be able to redeem some weapon skins (not tied to any achievements like the Flaming or Midnight Omen skins) for your efforts. After unlocking the challenge, visit the below link and login with your Xbox account that unlocked the challenge and click 'Claim Reward' under the appropriate spot.https://gearsofwar.com/en-us/my-rewards
Any questions, comments, or concerns feel free to leave a comment below or shoot me a message here on TA.