Hollow Knight is a 2017 Metroidvania video game developed and published by Australian independent developer Team Cherry. The player controls the Knight, an insectoid warrior exploring Hallownest, a fallen kingdom plagued by a supernatural disease. The game is set in diverse subterranean locations, featuring friendly and hostile insectoid characters and numerous bosses. Players have the opportunity to unlock abilities as they explore, along with pieces of lore and flavour text that are spread throughout the kingdom.

The concept behind Hollow Knight was conceived in 2013 in the Ludum Dare game jam. Adelaide-based Team Cherry wanted to create a game inspired by older platformers that replicated the explorational aspects of its influences. Inspirations for the game include Faxanadu, Metroid, Zelda II: The Adventure of Link, and Mega Man X. Development was partially funded through a Kickstarter crowdfunding campaign that raised over A$57,000 by the end of 2014. It was released for Windows, Linux, and macOS, in early 2017 and for the Nintendo Switch, PlayStation 4, and Xbox One in 2018. After release, Team Cherry supported the game with four free expansions as downloadable content.