Growtopia Locks

Growtopia is a free – to – play sandbox MMO gamewhere you have almost endless possibilities for world creation and customization. Bring your friends with you and have fun enjoying thousands of items, challenges and events.

You can buy diamond locks to private your own world.

Join a universe of unlimited worlds, all connected to each other. Collect seeds, grow trees, harvest and combine seeds to make new ones. As universes go, every day in Growtopia you can meet heroes and some villains too.
Also there is some other world locks you can find to create your own universe