A player recently pointed out that the German Version of Anomalies did not activate Steam Achievements. I realized that I had not updated the German version in quite some time, so I apologize about that.
The German version is now updated. You may have to go to "Anomalies > Properties > Verify Integrity of Game Files" to make sure it gets updated on your system. Restarting Steam also works, I think.
You will know the version is up to date if you see the "Aktivieren Sie das erweiterte Spawn-Menü" option in the Options Panel.