Tumbler is one of the challenges in Tumblewood, the first area of the game Cactus McCoy 2: The Ruins of Calavera. It is achieved by destroying all of the tumbleweed in the area.
As only blade-like weapons (such as machete) can cut tumbleweed, these weapons need to be obtained first to complete the challenge. You can also complete the challenge the first time you enter the level.
Community content is available under CC-BY-SA unless otherwise noted.