I do not give my achievement I've killed things seen places

It sounds like it either didn't unlock due to some sort of delay, which can happen from time to time, or it didn't register for one of the ten maps. If it's the first issue, typically this resolves itself within a few days. If it's the latter, the achievement
does require that you go through all waves from 1 to 50 consecutively. If you join a game that isn't at wave 1, or rejoin it at any point, it resets

try to wait some more maybe it will unlock in the next days or try these https://support.xbox.com/en-US/games/troubleshooting/troubleshoot-achievements-challenges

Hi,

Failure to establish a secured network connection between your device and the in-game server is one possible reason why you're encountering this issue. To resolve this concern, we suggest that you follow the steps given by Mister Cerb on this

link. The steps on that page can help resolve issues regarding game achievements.

If the same instance occurs, kindly get in touch with the Gears of War community for in-depth assistance. Click this
link to submit a post.

Let us know if there's anything else we can help you with. We'd be glad to further assist you.

I already did everything listed on this link, and still nothing.

And ask people to talk to the developer is not really helpful, right? Wouldn't be easier to put a sticker on the forum "talk directly to the developer for game issues"? It would save us both some time.

Thanks anyway

Hi,

Failure to establish a secured network connection between your device and the in-game server is one possible reason why you're encountering this issue. To resolve this concern, we suggest that you follow the steps given by Mister Cerb on this

link. The steps on that page can help resolve issues regarding game achievements.

If the same instance occurs, kindly get in touch with the Gears of War community for in-depth assistance. Click this
link to submit a post.

Let us know if there's anything else we can help you with. We'd be glad to further assist you.

I love the idea of achievements im a achievement hunter myself and in games it gives u reason to explore certain places or do certain things in the game u wouldnt normally do but one thing i would implement is some in game rewards attached to achievements
when u complete them it would give people more reason to do them