Ranked in these QuestionsQuestion Ranking
Pro Atmospheric sound and graphics
Metroid paved the way for using not only sound and graphics, but level design as an element of atmosphere in games. Its deep, dark, winding tunnels with cleverly hidden passages and non-linear gameplay, together with its foreboding soundtrack and sound effects create a desolate feeling of loneliness akin to the cinematography of the film "Alien".
Pro Challenged players' assumptions
Metroid uses this mechanic to go step further - upon being completed in under a certain amount of time, it breaks players assumptions and defies gender stereotypes in revealing that the hero they've been playing as is actually a heroine.
Pro Encouraged speed running
Metroid's innovation doesn't stop there - Metroid was one of the first games to not only cater to, but encourage speed running, a concept ultimately popularized by one of its sequels, Super Metroid.
Pro Created a new sub-genre (Metroidvania)
Because of their atmospheric design and non-linear gameplay, Metroid and Castlevania have forged their own sub-genre, original enough to bear their names - Metroidvania.