What is "gaplus"

is a fixed shooter arcade game that was released by Namco in 1984. It was the only other game to run on Namco Phozon hardware, and in the US, a modification kit was later released to change the name to Galaga 3, possibly to increase recognition among fans of the games even though there was no "Galaga 2".

There are few known ports of this game. It appears on some multi-game cartridges, which were released long after its arcade release. It was ported to the Sony PlayStation in 1996 as one of the games featured in Namco Museum Volume 2, using its original name, Gaplus. It was also released on mobile phones with its Galaga 3 title, and is also part of the Namco Museum Remix (2007) and Namco Museum Megamix (2010) for the Wii with its original title being used. The original version was later re-released under its original name for the Wii Virtual Console Arcade on March 25, 2009 in North America, at a cost of 600 Wii Points (500 Wii Points in Europe and Australia).

Along with Galaxian, Galaga, and Galaga '88, Gaplus was "redesigned and modernized" for an iPhone app compilation called the Galaga 30th Anniversary Collection, released in commemoration of the event by Namco Bandai.