This achievement is quite simple and I would recommend doing it once you get the "Expendable" achievement. For a solution on that achievement, please view my solution below.
You will be introduced to creating clones early on in the prologue. You will have to create a clone in order to crawl underneath the gate to progress. Do not activate the gate just yet though as you can spawn clones infinitely here.
To spawn the clone, press
+
. Now press and hold
again and then continuously tap
. This way your clone will be instantly destroyed. Repeat the process 15 or 30 times for your achievement. If you are confused about anything, please view my video below.