Cozy winter puzzle for Android
Heat Lines
Lay the pipes, light the cabins.
A snowstorm has frozen the village, but your furnace still burns. Connect copper pipes to every frozen cabin and watch the windows glow again.
- 100 levels
- Daily puzzle
- No timers
- Plays offline
Simple to learn, satisfying to master
Every level is a fixed, fully visible puzzle. Nothing is random: you see your pieces coming and plan the route.
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Pick a pipe
Your hand holds three copper pipes: straights, corners, T-junctions and crosses. Tap one to turn it.
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Lay it on the snow
Drag it onto the board. Heat flows from the furnace through every pipe whose openings meet.
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Light every cabin
Warm all the cabins before your pieces run out. Pieces you didn't need earn you stars.
Warm the cabin
A tiny Heat Lines board you can play right now. Pick a pipe, tap it again to turn it, then place it on the snow. Carry the heat from the furnace, around the rock, to the frozen cabin.
The full game has 100 levels that add ice, rocks, old pipes, lodges and a second furnace. Read the complete guide to the rules.
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A calm puzzle that makes you think
Heat Lines is made for short, cozy sessions: one more level with your tea, then the village glows a little brighter.
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100 levels, 10 chapters
From Pine Hollow to the Northern Lights, each chapter adds a new idea, with gentle breathers and proper brain-teasers along the way.
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No timers, no energy
Think as long as you like. No lives to run out, no waiting to play the next level.
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Fair, solvable puzzles
Every level is checked by a solver, so it can always be won from the start. Lantern hints show a move that really leads to a win.
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Help when you want it
Undo a move, light a Lantern hint, drop in a Wildcard pipe or Thaw a block of ice. Boosters are optional and never required.
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Plays offline
Every level, the village and the daily puzzle work without a connection, on the train or under a blanket.
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Rewards for how you play
Each win counts your warm cabins, spare pieces and new stars, then pays Embers to spend in your village.
Ice, rocks, old pipes and more
Each chapter brings something new to think about, introduced one at a time so you always know what changed.
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Ice blocks
Ice melts when heat reaches the tile next to it, opening a new path for your pipes.
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Rocks
Rocks never move. Find another way around them.
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Old pipes
Old pipes already on the board carry heat, but you can't move or turn them.
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Lodges
A lodge only warms up when heat reaches it from two different sides.
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Two furnaces
Later boards have two furnaces. Heat can start from either one.
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Crosses and the hold slot
Crosses join all four sides, and the hold slot keeps one piece aside for later.
A village that works for you
Every win pays Embers. Spend them on ten cozy buildings, and each one gives something back: the Bakery bakes free Lantern hints, the Blacksmith forges Wildcards, the Post office sends a parcel every day, and the Inn adds a bonus to every win.
- Ten buildings, each with five levels
- 24 decorations, from a bonfire ring to an ice palace
- Village Warmth unlocks new board colors and pipe skins
- Collect what your buildings make with a single tap
A new puzzle every day
Once you finish level 15, a fresh daily puzzle arrives each morning. Solve it to keep your streak burning: day three brings bonus Coins, and day seven adds a free Lantern.
- The same puzzle for everyone, with relaxed Mondays and Sundays and a Saturday challenge
- Its own streak, separate from the main levels
- Plays offline like every other level
See Heat Lines in action
Real screenshots from the game. Tap one to see it larger.
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Lay the pipes -
Melt the ice -
Every win counts -
Warm up the village -
Pipes and colors
Ten winter chapters
Each chapter has ten levels and ends with a finale: a long heat run that lights up a whole line of cabins at once.
- Pine HollowLevels 1-10
- Frost CreekLevels 11-20
- Lantern RidgeLevels 21-30
- Iceberg HarborLevels 31-40
- Aurora FieldsLevels 41-50
- Glacier MillLevels 51-60
- Snowdrift PassLevels 61-70
- Polar StationLevels 71-80
- Ember FallsLevels 81-90
- Northern LightsLevels 91-100
Frequently asked questions
What is Heat Lines?
Heat Lines is a cozy winter puzzle game for Android. You place copper pipes on a snowy board to carry heat from a furnace to every frozen cabin. Each level is a fixed, fully visible puzzle with no luck involved.
Is Heat Lines free to play?
Yes. Heat Lines is free to download and play, with optional ads and in-app purchases. Rewarded ads are always your choice, and the Remove ads purchase turns off the ads between levels.
When and where can I download Heat Lines?
Heat Lines is coming soon to Google Play for Android phones running Android 7.0 or later.
Does Heat Lines work offline?
Yes. All levels, the village and the daily puzzle work without an internet connection. Only ads need a connection.
How many levels does Heat Lines have?
Heat Lines has 100 levels across 10 winter chapters, plus a new daily puzzle every day once you finish level 15.
Are there timers or energy in Heat Lines?
No. There are no timers, no energy and no waiting. You can think about each move for as long as you like.
Is Heat Lines hard?
It starts gently with a short guide and grows step by step: ice blocks, rocks, old pipes, lodges that need heat from two sides, and boards with two furnaces. Hints, undo and boosters help when you get stuck, and every level is checked to be solvable. The Heat Lines guide explains every rule and has tips for tricky levels.
Coming soon to Google Play
Heat Lines is in its final testing. Want to know the day it lands, or join the test? Send us a note and we'll write back when it's ready.