Hot Lava is a 2019 platform video game developed and published by Klei Entertainment.

Announced in 2016, it was developed by Mark Laprairie before he was hired by Klei who turned it into a full game.

It was released on September 19, 2019, for Microsoft Windows through Steam and for iOS, macOS, and tvOS through Apple Arcade.

The plot is non-linear and vague, but revolves around the player character 'Squirt' and their older sister (represented by life-sized action figures) as they play tag, chase and, most notably, the floor is lava, set in fantasized versions of childhood environments - namely Gym-Class, Playground, School, Wholesale, Master-Class, and Basement.

[4][9] Klei added Steam Workshop compatibility, allowing players to design and publish their own parkour maps for others to play ingame.