You can find the low violence trilogy on CD on the German Amazon: https://www.amazon.de/Grand-Theft-Auto-The-Trilogy/dp/B001UW5G74 … The downside is that it's quite expensive, €13 used and €45 new.
One year ago I tried to activate this key on Steam. It warned me that it had regional restrictions, so I asked my friend from Germany to help me.
Well, this key activated International GTA versions. The main idea was to get censored (Low Violence) versions and I failed. 
https://twitter.com/NationalPepper/status/1042109745828638725 …
Here is a rare and quite unpopular "GTA - The Trilogy" Steam edition available in Germany.
You pay for the piece of paper containing a code for 3 GTA games on Steam.
They decided to use DVD case with no disc in it. Looks clunky and very cheap. 
Cost 5 Euros ($6), no joke. pic.twitter.com/PtiVMAIzUc
Cost 5 Euros ($6), no joke. pic.twitter.com/PtiVMAIzUc-
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I am more interested in the Steam release.
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