Return to the Venture Explorer is a battle instance that became available after the December 2010 patch. It is both the only battle instance with an NPC, and the only battle instance that is strictly single player.
After escaping the Venture Explorer and traversing Avant Gardens, players meet up with Sky Lane at the Launch Area and are requested to return to the dying spaceship to assist Epsilon Starcracker. Upon arrival, Epsilon sends players on a series of missions, involving retrieving data cards with information about Nexus Tower, fighting off the invading Stromlings, and finally, decoding a message from the Maelstrom with the use of the ship's computers. Epsilon then sends players back to Avant Gardens, though they can return and play daily versions of the previously completed missions at any time, or complete achievements for the battle instance. However, original achievements for the Venture Explorer cannot be completed after exiting and traveling to Avant Gardens for the first time. This is because Venture Explorer and Return to The Venture Explorer are two different instances of the world.