I have an idea about how I could convert the Paizo adventure path Curse of the Crimson Throne (a medieval fantasy adventure that is mostly urban with some trips afield) to a post-apocalyptic modern setting. I'd appreciate any feedback in this kind of a conversion project and for running d20 modern games in general, which I'm newish at. I am planning on using d20 modern and d20 apocalypse (which I'm waiting to get on ebay).
The game would be set in the city of Vancouver, British Columbia, Canada:
Link to google maps of the city
The biggest reason for Why Vancouver is because the geography fits.
Tomorrow, Nuclear Armageddon initiated by a computer virus levels most world cities and causes every nuclear-powered vessel to melt down, worldwide. Retaliatory wars serve to further dwindle military hardware. Vancouver is spared from a direct hit but the ICBM that targeted the city detonated under the ocean water to the west sending a 5-metre tidal wave that washes over low-elevation parts of the city, destroying much of Richmond, Delta, Surrey and Coquitlam. After two years of nuclear winter, the climate warms dramatically. Sea level rise turns Vancouver into a sub-tropical island everywhere west of Port Coquitlam. Fallout causes widespread mutations but the on-shore Pacific breeze tends to protect Vancouverites from the worst of it; things are much worse east of the Rocky Mountains, as far as people know the eastern seaboard is uninhabitable as is europe and much of asia.
50 years later Pose Apocalypse, Vancouver is a fortified island-state, protecting its citizens from the mutants that menace the countryside. Survivors from the Interior trickle in to the city and only the First Nations (native Salish Indian) tribes remain in the wild mountains to the East.
Vancouver is now a city-state led by a President and his First Lady.
Modern but with limited gasoline and other commodities. Electricity generation is local and is therefore extremely limited (wind, solar, tidal sources only - hydroelectric sources are too far away to be adequately defended). Lots of cars and boats are around to be rebuilt and maintained but air travel is extremely rare as the Tsunami wiped out the Airport. Probably a barter economy.
Vancouver is a cosmopolitan city with majority european ancestry but with large Chinese and South Asian minority populations (Pakistani, Indian, Bangladeshi and Sri Lankan) with some natives (Salish Indians)
A Palace is built on the Stanley Park grounds and false creek now connects to Vancouver Harbour and separates the old downtown from the rest of the city to the east.
Everything south of the river (Richmond, Delta, Surrey) is flooded, everything up-river from Burnaby or so was destroyed in mud slides after the big melt (post-nuclear winter) and is now farmland, ruins or underwater.