Goemon may refer to:

Ishikawa Goemon (1558–1594), legendary ninja warrior and bandit hero
Goemon Ishikawa XIII, his fictional descendant, created by Monkey Punch for his manga series Lupin III
A fictional version of the hero who stars as the protagonist of the video game Ganbare Goemon
Goemon (series), the video game series
Goemon (film), a 2009 film by Kazuaki Kiriya

Gradius 2 may refer to:

Gradius 2, a 1987 computer game.
Gradius II, a 1988 arcade game.
These are two games in the same series, but they are otherwise unrelated.

Galaga (ギャラガ, Gyaraga) is a Japanese shoot 'em up arcade game developed and published by Namco Japan and by Midway in North America in 1981. It is the sequel to 1979's Galaxian. The gameplay of Galaga puts the player in control of a spacecraft which is situated at the bottom of the screen, with enemy aliens arriving in formation at the beginning of a stage, either trying to destroy, collide, or capture the spaceship, with the player progressing every time alien forces are vanquished.

Galaga is one of the most commercially and critically successful games from the golden age of arcade video games. The arcade version of it has been ported to many consoles, and it has had several sequels. In 2011, the game celebrated its 30th anniversary with the release of Galaga 30th Collection for iOS.