If you're unsure about how to install add-ons for Blockland, follow these instructions precisely. 1:) Click the link above to download System_ReturnToBlockland.zip to your computer. 2:) Find the location of your Blockland folder. 3:) Drag or copy System_ReturnToBlockland.zip into the Add-Ons folder which is inside your Blockland folder. 4:) Open Blockland and make sure that RTB was installed correctly.