User blog comment:SilentKillerlurks/Does anyone know what Creepypasta that involves experiments on people in creepypastas/@comment-24101790-20140720134903

Welp, there are the more popular ones like The Russian Sleep Experiment and the Tulpa, I even have one of my own A White Horse.

We also have an entire category dedicated to that topic (http://creepypasta.wikia.com/wiki/Category:Science_Pastas) that might make it easier to find what you're looking for.