I think i did it!

but is it sure i'm going to have the achievement in 24 uhr?

the 1337 achievement is for belt rank I believe. You can see your belt rank if you type /stats muffineat

if i remember, you need that rank on your usercard and not ingame, but i'm not sure.

belt '' ranks '' are like if you get rank 1 in your usercard, it means you have most games on your belt.

You need to get 1337 in your usercard, meaning you need to play enough games 2 get 1337 tho

From this lovely stuff:

okay...thanks
i don't think i am going to get the achievement xD

Even if you get rank 1337 it may not grant you the achievement. Some are simply broken. Make sure to grab a screenshot and PM ishi for all your broken achievement needs.

I didn't know that thanks solax