A new SmartzOS game
Tunnel CityPrototype open
A free city-builder set around the Tunnel. Build your blocks, keep production running, trade with other members and grow your district, in about 5–10 minutes a day.
- 18+ only
- Free to play
- No wallet needed to start
The map
Koda's Bastion
Fortress blocks, walls and vaults. Housing, storage and keeping your blocks safe.
Tauron's Forge
Factories and neon foundries. Production, upgrades and the Burn Furnace.
Phoenix Yards
Rail yards and the trading hall. A neutral market every member shares, where the Exchange lives.
The Loop
The subway line that ties every district to the Tunnel. Zoran rides it, carrying goods between stations.
What you'll do
- BuildPlace homes, workshops, depots and stations on your plot.
- ProduceBuildings make Stone, Alloy, Freight and Flux while you're away.
- TradeSwap what you have spare with other members in Phoenix Yards.
- UpgradeLevel up buildings, connect stations to the Loop, grow your plot.
- Rush HourA daily one-hour city event, like double production or a shared build.
Get ready now
🎓 Earn KP in SmartzOS
Lessons, guides, practice trades and your daily check-in build your KP. KP milestones will unlock blueprints in the city.
Open SmartzOS →🛡️ Pick Shield or Strike
Your side in SmartzOS becomes your home district: Shield for Koda's Bastion, Strike for Tauron's Forge.
Choose your side →✈️ Join Telegram
Build updates, playtest invites and Rush Hour news land in the group first.
Join the group ↗⚠️ The rules
- 18+ only.
- Tunnel City is a game. Nothing in it is an investment, and nothing in it promises any money or value.
- In-game currency and items have no cash value and can't be cashed out.
- No prizes, no paid random rewards.
- We never ask for your seed phrase or private key. Anyone who does is a scammer.
- Community tokens are high risk and can lose all their value. Nothing here is a prediction of any token's price, and nothing here is financial advice.