Your colony starts on the rooftop of a partially submerged skyscraper in a flooded metropolitan area. Dozens of other building rooftops are accessible by bridge — each containing salvage and survivor outposts.
Key Challenge
Every rooftop building has unique structural quirks from pre-existing architecture damage. Some skyscraper tops are stable, others have severely compromised foundations that give way after you build on them. Scouting with Sailors before committing to a new rooftop is essential.
Strategy
- 1.
Prioritize bridge construction to adjacent rooftops in the first 15 days. Each connected rooftop adds its survivor population to your faction counts, and some rooftops have unique buildings already constructed (a pre-built Distillery, a Workshop, a Trade Pier) that you can immediately use.
- 2.
The scenario's primary resource scarcity is Limestone — essential for Concrete but very rare on rooftops. Trade routes are the primary Limestone source. Establish a Trade Pier and get Sailors on trade runs by Day 8.
- 3.
The rising water mechanic triggers a rooftop submersion event every 15 days, permanently drowning the lowest rooftop you haven't evacuated. Plan your bridge network to evacuate lower rooftops before each submersion event.
Quick Tips
- ▶ The Sunken City has the most pre-existing structures of any scenario — use the deconstruct tool on damaged pre-built structures to recover 60% of their materials for free.
- ▶ Connect all rooftops into a single network before Day 30 — isolated rooftops that get submerged lose their survivor populations permanently.
- ▶ The endgame requires finding and activating the city's pre-flood Emergency Broadcast Tower (located on the tallest skyscraper). This signals a rescue fleet and completes the scenario.