What is a Metroidvania?
A genre named after two games that had never met: Metroid supplied the map, Castlevania supplied the castle.
Metroidvania is a portmanteau with a thesis. Take the structure of Metroid, a continuous world gated by abilities, and the gothic action-RPG form Konami gave it in Castlevania: Symphony of the Night (1997), and you have the template for thousands of games since. The word is younger than both parents.
THE DEFINITION
What the word claimsHapp’s test
Axiom Verge developer Tom Happ, himself a Metroid disciple, defines the form plainly: side-scrolling adventures with continuous maps rather than discrete levels, where progress requires collecting items and backtracking. By that test Metroid (1986) is not an example of the genre. It is the source code.
The naming
Critics, Jeremy Parish prominent among them, popularised "Metroidvania" in the late 1990s and 2000s as Symphony of the Night’s descendants multiplied. Nintendo and Konami never coined it; the fandom named the genre after its two parents and the industry adopted the word.
The descendants
Cave Story, Shadow Complex, Axiom Verge, Ori and the Blind Forest, Hollow Knight: the modern indie canon is substantially a Metroid tribute shelf. The series sits in the small company of games with genres named for them, beside Rogue and Dark Souls.
The irony
While the genre exploded, Metroid itself was often absent: eight years silent before 2002, seven after 2010. For long stretches, the most Metroid-like games in the world were being made by everyone except Nintendo. Dread’s 3.07 million sales in 2021 were the originator reclaiming its own word.