Build an island city. Survive the volcano. Perform the SACRED RITUAL to seal the mountain forever.
Click a tool → click a tile to place. Drag the map to pan. Click the mini-map to jump there.
Hotkeys 1-9 select the first nine tools (PAN, INSPECT, ROAD, HOUSE, SHOP, FARM, DOCK, TEMPLE, TOURIST). SPACE = bulldoze. + / - change sim speed (or click the SPEED stat).
HOUSE $50 — population + income. Needs a road.
SHOP $120 — bigger income next to houses. Needs a road.
FARM $80 — steady income, no road needed.
DOCK $200 — high coastal income.
TEMPLE $180 — calms the volcano (-0.6 pressure / tick).
TOURIST $90 — high income but fragile in eruptions.
MINE $150 — best income, but raises pressure (+0.5 / tick).
LIGHTHOUSE $220 — coastal income; each one delays the next rumble.
BARRICADE $40 — absorbs one lava flow, then becomes rubble.
Pressure rises every tick — time alone adds to it, and houses + shops feed it (+0.6 each). Temples lower it. When pressure crosses the threshold the mountain RUMBLES, then ERUPTS. Each eruption clears the pressure but destroys nearby buildings.
Eruption tier grows with the game year. Early ones are mild; late ones can devastate. Types: Standard lava flow, Pyroclastic surge, Lahar mudflow, Tephra storm — each spreads differently. Watch the VOLC mood.
The mini-map shows a gold ring around the volcano. Temples inside it count toward the SACRED RITUAL. To win: place 5 temples in the ring, grow population to 100+, survive at least 2 eruptions, then click RITUAL ($800). The volcano must be QUIET when you ritual.
If those conditions aren't met, RITUAL still fires as a panic button — $800 drops pressure and turns nearby grass/rock to obsidian.
If your thriving city collapses to near zero population after surviving an eruption, the volcano wins and the game ends. TRY AGAIN.
You have brought eternal peace to the island.
Your legend will echo through the ages.
The volcano has taken your island.
Your people are gone — only ash remains.