Frostpunk is a steampunk city-builder released by 11 bit studios in 2018, centered on keeping a coal generator alive in a frozen world. The generator's shifting drone became iconic among players because it signals incoming temperature drops that can wipe out a city. Clips of the sound spread online as shorthand for dread, cold and failing systems, often captioned with Frostpunk memes about winter or resource collapse. Its bleak industrial tone keeps it popular for survival edits years after launch.