"Looks like a door key. Has a keychain advertising the 'Riverside Motel'."
Unlocks the front door of the Riverside Motel
Artaud Theater's lobby
Silent Hill: Origins
The Motel Key is an key Travis Grady comes across in the lobby of the Artaud Theater. After the boss fight with Caliban, he finds a dead Ariel near the theater's exit door with. It has the key in its hand, which Travis picks up before leaving.
The motel key unlocks the front door of the Riverside Motel's reception on Riverside Drive.