Durarara!! 3way Standoff: Alley V has double the scenario size of the PSP game and that includes three brand new what if routes.
Neocrisis: Here are new screenshots for Durarara!! 3way standoff - Alley coming to PSP.
Siliconera: It looks as though Kadokawa Games (Earth Seeker, Rodea) are following 3way Standoff up with an “enhanced” version containing more content, titled Durarara!! 3way Standoff –Alley-.