Dead Rising 2: Case West set for December - GameSpot

Capcom sets release window for Xbox 360-exclusive addendum to zombie action game, confirms return of photography gameplay mechanic.
Dead Rising 2: Case West brings Chuck Greene and Frank West team up for downloadable co-op zombie destruction.

Dead Rising 2: Case West Review - IGN

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Dead Rising 2: Case West - IGN

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Dead Rising 2: Case West, Dead Rising Wiki

Shippin' Out August 29-September 4: Metroid: Other M, Valkyria

Dead Rising 2: Case West, Dead Rising Wiki