Mode in Spintires, Spintires: MudRunner and SnowRunner for a special map where the player can freely spawn and modify test vehicles and trailers on a small map with all kinds of terrain and obstacles. Completing a goal will unlock the next challenge. The base game contains 9 challenge maps, with American Wilds expansion challenges were expanded to 11 maps. Mode introduced in Spintires: MudRunner for maps with non-standard goal rather then sandbox maps. In SnowRunner, only the host will progress through missions. Mode in Spintires, Spintires: MudRunner and SnowRunner that allows up to 4 people to play on sandbox maps together. Completing goal will give Progression Points used to unlock next maps and trucks. Default mode for maps in Spintires and Spintires: MudRunner, can be played in single and multiplayer modes.
