Klonoa: Door to Phantomile

Klonoa: Door to Phantomile is a side-scrolling platform game viewed from a "2.5D" perspective. The player moves the protagonist, Klonoa, along a path in a two-dimensional fashion, but the game is rendered in three dimensions. This allows the path followed to curve and for the player to interact with objects outside of the path.

The game is set in Phantomile, a land fueled by dreams people have at night. An anthropomorphic animal named Klonoa has had a dream about an airship crashing into a nearby mountain known as Bell Hill, and the next day an airship does indeed crash into the mountain.