The Sewer is a major location in One Leaves. Geographically, it follows the hospital and is the final area in the game, leading to the exit.

It's full of twists, turns and dead-ends. Brick hallways turn into cancerous growths, and the floor is a river of tar. Corridors end in mounds of hellish teeth and organs.

Most of the high-value achievements can be won in this area — both for finding your way out of the sewer — and for getting trapped in it.

It's comprised of a number of locations, some of which can be seen here:

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