Thaw Radius

Incremental skill tree game
1 player
Phones and computers

Thaw Radius is an incremental skill tree game that plays in the browser on phones, tablets and computers, for one player.

You sweep a warm ring over a frozen lake in short rounds, melting ice crystals into meltwater, and the ring melts fastest when you hold it still. Between rounds you spend meltwater on a 42-node upgrade tree. Buying the final node thaws the whole lake and ends the game, and your total time is kept.

Play Thaw Radius

How to play

Move the ring over ice crystals to melt themOn a touch screen: Drag the ring over ice crystals to melt them
Hold still: the ring heats up fully and melts faster
Meltwater drifts to the ring. Anything left at the bell is half lost
After the round: tap a node in the tree, then Buy. Then start the next round
The node in the middle thaws the whole lake and ends the game

The game shows these steps as you play, the first time.

Thaw Radius gameplay — Thaw Radius in play

Controls

Move the mouse or a finger to move the ring
In the tree, tap a node then Buy
Space starts the next round

Tips

The ring runs at 35 percent heat while moving and reaches full heat only after 0.6 seconds held still, so parking on a big crystal beats sweeping across small ones.
Meltwater lying on the ice when the bell rings counts only half, so spend the last seconds of a round drifting toward loose drops instead of starting a new crystal.
Cross nodes cost 1.8 times the branch cost at their depth, each branch is 8 percent dearer than the one before, and the final node needs all five branch ends.

How long does Thaw Radius take to finish?

A simulated efficient player who parks on the best crystal and spends eight seconds in the tree each round finishes in about 134 rounds, roughly 93 minutes. Real players take longer, and the target is two to three hours. Progress saves after every round and purchase, and the total time and best time are kept.

What is in the upgrade tree?

A root, then five branches of six nodes: Heat multiplies melting by 1.4, Reach widens the ring by 10, Time adds 3 seconds to a round, Bloom brings more and bigger crystals, and Flow multiplies meltwater by 1.45. Ten cross nodes sit between neighbouring branches, and the final node, costing 300,000, thaws the lake and ends the game.

About this game

Made by Sucia in Houston, Texas. Built with AI assistance, designed and tested by Sucia. Last updated October 4, 2026. It plays in the browser on phones, tablets and computers, with no download and no sign-in; your best scores and progress stay in this browser on this device. Without a pass, every game is free for 5 minutes a game and 30 minutes a day; an Arcade pass removes the limit. How Sucia makes and tests its games.

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