Defense of the Sentinel Base is an unreleased shooting gallery minigame in Avant Gardens. Players would have stood on top of the gate at the Sentinel Base Camp, manning a launcher used to attack the enemies in the battlegrounds below. Due to the closure of LEGO Universe, the minigame was left unfinished and was never released. A video of the minigame was uploaded by a GM in June 2012, though the minigame was shown to be unplayable.