i used this: https://unix.stackexchange.com/questions/215864/running-x86-binaries-on-armv7 in combination with
First was a problem with the sources.list, because the ones for the i386 were missing, so after some research i found the right repositories. So after this problem was fixed i ran "sudo apt-get install libc6:i386" and was greeted with a message saying, if you do this practically everything on this system will be deleted. (I dont have the output saved and to get it again, i would need to reinstall the i386 architecture and fix the sources errors, so i cant show it sorry =/ )
Maybe i can get wine to work and try to emulate the windows version of steamcmd. After my finals in the next weeks i´ll try that, and if it does i will let you guys know.
If in the meantime someone knows or finds an easy solution, please let me know.