Which shooter arcade game defined its genre?

[killamch89]

From Galaga and Space Invaders to later classics like R-Type and 1942, shoot-’em-ups evolved rapidly in the arcade scene. Which title do you consider the genre’s cornerstone - the one that set design standards, inspired countless clones, or introduced revolutionary mechanics? Was it the precision of bullet-hell patterns in Ikaruga, the fast-paced vertical scrolling of Raiden, or the cooperative focus of Contra’s arcade iterations?

[Scorpion]

Galaga is often considered the defining shooter arcade game. Its innovative gameplay, colorful graphics, and engaging mechanics set the standard for the genre, influencing countless future shooters and remaining a beloved classic that truly defined its era.

[killamch89]

House of the Dead’ introduced cinematic on-rails light-gun shooting with branching paths and boss battles, setting the template for immersive horror shooters in arcades.