Return to Blockland, (shortened to RTB; not to be confused with v1.045) was an in-game client for Blockland originally created by user Ephialtes.
From (at least) 2008 to 2014, Return to Blockland hosted 3,318 add-ons according to their statistics.[1]
As of 2014, the main servers and website were taken down due to a dispute between Ephialtes and Badspot, and also due to changes in anti-DDoS policies for RTB's dedicated server provider.[Citation(s) Needed]
Active alternatives as of 2020 include BLG, and oRBs.