A single-player casual game. Play as Sandbox characters, parkour, and parkour, or idle, and idle.
Unserious Sandbox is a single-player casual game with some unserious parkour.

Traversal is a skill-based movement game, like KZ, Surf, or Minecraft parkour. The core of traversal is about using as little movement input as possible.
Play with ragdoll physics in sandbox maps. Embrace the chaos and master the art of falling flat...?
One day, a Sandbox learned two words: Unseriverse, Susbicious. Then, the Sandbox became unserious and began parkour.