A Metroidvania is an adventure set on a large, interconnected map where many paths are initially blocked. A new ability — a double jump, a dash, or a grappling hook — opens paths to previously unexplored areas, and the world gradually unfolds. The name derives from the two founding titles of the genre, Metroid and Castlevania, while modern examples include Hollow Knight, the Ori series, and Blasphemous.
No. There are tough games with tough bosses, and there are more laid-back ones where the main focus is exploring the map and collecting secrets. The Ori series is a good first step. If you're looking for a real challenge, check out the "Similar to Dark Souls" tag.
Start by sorting by rating — this will put the best Metroidvanias available for torrent download at the top.