Namco Bandai Games teased "Galaga Legions DX" on November 16, 2010. The company revealed that the game would be the second title released under its Namco Generations series of classic game updates, which included "Pac-Man Championship Edition DX" and the later-cancelled "Aero-Cross". Namco Bandai released a teaser trailer in April 2011, where it announced the game would coincide with the 30th anniversary of the original "Galaga". A playable demo was demonstrated at E3 2011.