Achievement World - when you first load into the world you will be greeted with 3 command blocks. One of them being to change into creative mode, another being to change back to survival, and the last one to give you a command block to write your own commands. The world is untraceable if you are in creative as long as you use the command blocks and not the click UI.
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Changelog
Changed link to only have you wait 5 seconds then read article for 10 seconds then show link rather than download an addon or turn on notifications
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