Rust is a small multiplayer map featured in Call of Duty: Modern Warfare 2, based on the campaign mission "Endgame". The map is also featured in Call of Duty: Modern Warfare as part of the Season Two of content for the game. [1] Rust is also available in Call of Duty: Mobile and was added on April 29, 2020 as part of the Season 6 Once Upon a Time in Rust update.