Arcade-era Namco was good at sequels. Not from a story perspective, mind — the sequel to “shoot the aliens” tended to be “shoot more aliens” — but definitely from a mechanical perspective.
One of the best things about arcade-era Namco’s handling of sequels was that they remained recognisably true to their source material while innovating in their own right. Galaga ’88 (also known as Galaga ’90, Galaga ’91 and Galaga 2 depending on where and how you played it back in the day) is one of the best examples of this, as the fourth installment in the Galaxian series.
Galaxian built on the basic premise of Taito’s Space Invaders by featuring a more dynamic arrangement of enemies. Galaga built further on this format with more dramatic enemy formations and movements. Gaplus — one of the few games in the series to not get many home ports, particularly back in the day — added powerups and vertical movement. And Galaga ’88… well, read on.