THIS CONTAINS A BUNCH OF SPOILERS FOR THE ACHIEVEMENT
THIS CONTAINS A BUNCH OF SPOILERS FOR THE ACHIEVEMENT
THIS CONTAINS A BUNCH OF SPOILERS FOR THE ACHIEVEMENT
THIS CONTAINS A BUNCH OF SPOILERS FOR THE ACHIEVEMENT
THIS CONTAINS A BUNCH OF SPOILERS FOR THE ACHIEVEMENT

anyway now I've got the disclaimer out of the way, today ill teach you how to get the hidden achievement (aka Larger than life)

First you want to open the main menu (or open the game)
Once you have done that, select "Create marble" In the bottom left.

Once you have opened the creator, name the marble "Andre The Giant" (Without the quotes)
Customise Andre however you wish, it doesn't matter

Now once you've done that, click "Save" and go back to the menu
Then open any world (loaded or new, doesn't matter)

Once you're in the world, add in a new spawner and click on it.
Select "Use custom marbles?" at the bottom of the window, Once done select Andre and use F (Or whatever you binded the spawn to)

And you should get the achievement, If this helped in an easy to read way, like and favourite!
(I don't know how to separate formatting text at the moment so if you know please comment!)