Soo.. what's Admin Ending? I tried to free the admin with only unlocking 3 robots, but can't transcend.

Difference between admin ending and 100% is number of stars. You need only 10 stars to unlock secret world.

Wait nozu, is that possible?

You can definitely free the Admin with only 10 stars and no robots but it doesn't let you transcend as it gives errors for not getting all the other robots.