Heat Lines: Pipe Puzzle

Lay the pipes, light the cabins.

A snowstorm has frozen the village. Your furnace still burns, and only you can carry its heat through the snow. Heat Lines is a cozy connect-the-pipes puzzle: lay copper pipes from the furnace to every frozen cabin and watch the windows glow again.

A pipe puzzle that makes you think
Like a classic plumber puzzle, but with heat instead of water. Every level is a fixed, fully visible logic puzzle. Nothing is random: you see your pieces coming and plan the route. Turn the pipes, branch the heat with T-junctions and crosses, and warm every cabin before your pieces run out. Use fewer pieces to earn three stars.

New ideas as you go
• Ice blocks melt when heat reaches them, opening new paths
• Rocks force you to find another way
• Old pipes carry heat, but they won't move
• Lodges need warmth from two sides
• Two furnaces, one board

Warm up the village
Earn Embers by solving levels and spend them on ten buildings that work for you: a bakery that bakes free hints, a blacksmith that forges Wildcards, a post office with a daily parcel, and more. Level them up, add decorations, and unlock new pipes and board colors as your village grows warmer. After every win the heat runs through the village's pipes, villagers move in as it warms up, and day turns to night. Name your village, arrange it your way and share a photo of it.

A daily pipe puzzle and daily goals
A new puzzle every day, the same for everyone. Solve it to keep your streak burning and earn bonus rewards. Three small daily goals give every session a purpose, and finishing them opens a chest. Gentle reminders tell you when the new puzzle is ready, if you want them.

Play your way
• 150 levels across 15 winter chapters
• No timers, no energy, no waiting
• Undo, hints and helpful boosters when you're stuck
• Plays offline: no wifi needed
• Gentle sounds and snowy music
• In English, German, French, Italian, Spanish and Turkish

A relaxing brain teaser for puzzle lovers: cozy, fair and satisfying, one pipe at a time.

Recent changes:
New in 1.1.1:
• Warm gifts: the village furnace makes a small gift every few hours
• Heat Run: warm cabins all week for rewards, with a new run every Monday
• Frost shields save your daily streak if you miss a day
• A welcome-back gift after a week away
• A Coin jar in the shop
• Gentler reminders: only when something is waiting, never at night