Hollow Knight is a 2D side-scrolling action adventure video game in the Metroidvania style. It was developed by Team Cherry and released for Microsoft Windows on 24 February 2017 and is also being developed for Mac, Linux and Nintendo Switch. Development was part funded through a Kickstarter crowdfunding campaign, raising A$57,138 in December 2014.
Players explore a large interconnected world using a variety of movement and combat techniques. In classic Metroidvania style, there are areas of the world that the player cannot access until they obtain particular items or abilities. Maps for each area must be bought from a shopkeeper generally hidden somewhere in that area, and the player can also buy upgrades that place markers on the map or allow them to reveal parts of the map as they explore. Many areas have a 'boss' enemy that the player must defeat in order to continue, and a number of sub-bosses that drop useful rewards or upgrades.
Defeated enemies drop Geo, a currency that the player can use to buy items from shopkeepers. If the player is killed, they respawn at the last place they rested and lose all their Geo. They must then return to their corpse and defeat a ghost in order to recover the currency. The player also earns 'Soul' by attacking enemies, which they can then spend to recover lost health or activate special abilities. Health can also be recovered at hot springs, which are located around the world, or by resting at a bench.
The game was well received, with a score of 87/100 on reviews aggregation website Metacritic. Tom Marks, writing at PC Gamer described the game as "the most beautiful hand drawn game [he'd] ever played". John Walker at Rock, Paper, Shotgun found the game a solid take on the Metroidvania genre, but felt that the previously released Ori and the Blind Forest was better in every element.