While the Metroidvania genre's roots trace back to the late 1980s with foundational titles like Metroid and Castlevania, 2018 stands out as a landmark year for its unprecedented output and diversity. This period saw developers pushing the boundaries of the genre, incorporating elements from other genres and even different mediums, creating a rich landscape for both long-time fans and newcomers.

The year began with Iconoclasts on January 23, offering a narrative-heavy approach to a genre typically focused on exploration, tackling themes of religion and authoritarianism while still providing satisfying combat. This was followed by Dandara on February 6, which infused Souls-like elements such as corpse runs and challenging difficulty. Its most distinctive feature was its unique movement system, which relied on angled leaps rather than traditional running and walking, allowing for gravity-defying traversal and combat.

Further experimentation arrived with Yoku's Island Express on May 29, a unique fusion that replaced standard Metroidvania progression with pinball mechanics. Players navigated a sprawling map composed of pinball tables, using flippers and paddles to guide the protagonist, a dung beetle mail carrier. The game's intuitive design made it a one-of-a-kind experience that has yet to be replicated.

Procedural generation also played a significant role in the genre's evolution during 2018. Chasm, released on July 31, generated its map at the start of each playthrough, offering a grander scale of roguelike experience where entire runs could take dozens of hours. Dead Cells, which exited early access on August 7, adopted a more traditional roguelike approach with procedurally generated biomes that changed with each run, encouraging players to build unique character builds. While Dead Cells achieved significant commercial success and ongoing support, Chasm remains a notable, if less commercially realized, experiment in the genre.

Several other titles contributed to the crowded and celebrated release calendar. Guacamelee! 2 arrived on August 2, featuring kinetic combat, and The Messenger, released on August 30, delivered a clever genre twist by transitioning from linear Ninja Gaiden-inspired platforming to non-linear Metroidvania exploration. These releases, alongside others like Super Daryl Deluxe, La Mulana 2, and Timespinner, ensured a steady stream of high-quality Metroidvania experiences throughout the year.

The success of these indie titles was partly facilitated by a less crowded AAA release schedule in 2018. Major releases like God of War, Red Dead Redemption 2, and Marvel's Spider-Man arrived at spaced intervals, leaving a void, particularly in the summer months, that allowed independent Metroidvania games to gain prominence. The Nintendo Switch, launched the previous year, also provided an ideal platform for these titles, with Hollow Knight receiving a crucial port to the console on June 12, significantly expanding its audience and solidifying its status as a modern classic.

This concentration of innovation and diverse offerings in 2018 created a dynamic environment for the Metroidvania genre, allowing it to reach new heights of creativity and popularity, building upon the foundational work laid by earlier seminal titles.

Metroid Prime Remastered gameplay

Dead Cells gameplay

Yoku's Island Express gameplay