Cosmo Gang

Cosmo Gang (コズモギャング Kozumo Gyangu?) is the title of two Namco arcade games from the early 1990s which feature characters from a redemption game of the same name (released in 1990, and licensed to Data East for US manufacture and distribution):

Cosmo Gang the Video (1991), a fixed shooter which plays similar to Namco’s own Galaxian.
Cosmo Gang the Puzzle (1992), a puzzle game which is similar to Tetris, and became the basis for Pac-Attack.