A 3D terrace-valley city builder

STRATA

Lay roads over ancient rock steps, raise homes and towers, and fill the valley with 350 residents before your treasury runs dry.

Play Now How to play

3D · three.js
Grid city building
Daily economy
No install

live preview — the camera orbits a starter colony

Why Strata

Living terraces. Every map is a stepped mesa of sunlit rock strata, carved fresh from a seed — build across three levels of cliffs.
Real economy. Roads, homes, towers and parks each carry upkeep; taxes arrive each day, parks boost income, and bankruptcy ends the run.
Tower rules. Homes need one road frontage; towers demand two road sides, so dense grids pay off and sprawl doesn't.
Day cycle & effects. Sunrise to dusk light sweeps the valley, beacons blink on towers, and builds burst with dust.
Plays in any browser. Pure static files with three.js — desktop keys and mouse, phone touch controls.

How to play

Goal

Reach 350 residents to win. If your treasury drops below $0 at the end of a day, you lose. Residents stream into homes and towers that touch your road network, and every day they pay taxes while every tile charges upkeep.

Keyboard & mouse

WASD move the build cursor · Q/E orbit, mouse wheel zooms, right-drag rotates · 1–5 pick Road, House, Tower, Park, Bulldoze · Space build, X bulldoze · P/Esc pause. Start screen: press Start Building (or Enter). Click a tile to move the cursor, left-click to build.

Touch