Compare Eraser & Builder prices across trusted key stores and find the best deal. Developed by CFK Co., Ltd.. Published by CFK Co., Ltd.. Released on 2/27/2017. Available on PC. Genres: Casual, Indie.

Forty-eight physics puzzles asking you to guide a fragile egg home. Brutally modest in scope, disarmingly honest about what it is, and best appreciated at face value.

I went into Eraser and Builder expecting almost nothing, and what I found was a pocket-sized physics puzzler that, at its best moments, has a quiet confidence most games five times its size lack. The core loop is as stripped-down as it gets: you manipulate the environment using mouse clicks to clear or construct paths, and your one job is to guide a helpless egg safely to the hen waiting at the other end of the level. That is the whole contract. No story, no score multiplier, no characters with backstories. Just physics, geometry, and a small round thing that absolutely must not crack. The Unity 3D physics engine doing the work here is not a marketing talking point bolted on for decoration. How objects fall, settle, and interact genuinely matters when you are trying to thread an egg through a gap you have manually carved. The deliberate weight to each interaction forces you to think one step ahead before you erase or place anything. The 48 included levels start gently and graduate into setups that require a real read of how chain reactions will play out. It is not a game that will tax veteran puzzle solvers for hours, but it does not pretend to be. Every level has a clear internal logic, and the satisfaction of getting it right the first try on a tricky stage is small but genuine. The Steam Workshop integration is the wildcard here. The community-level editor means the 48 base stages are technically just a starting library. Whether the Workshop remains active enough to give that promise real weight is a fair question for a 2017 title with a modest review count. What I can say is that the level editor exists, functions, and puts the same physics tools in the player's hands that the developers used. For a certain kind of person, that sandbox is the whole point. What holds it back is equally plain. The visual presentation is minimal to the point of austerity. There is no ambient soundtrack worth noting, no aesthetic identity that lingers after you close the window. The experience is closer to a browser-game session than a curated indie journey. Players hunting atmosphere, mood, or narrative texture will find the cupboard completely bare. This is a puzzle utility, not a puzzle experience. That framing is also its defence. Eraser and Builder knows exactly what it is, keeps its runtime honest, and delivers its modest promise without padding or pretence. For someone who wants a low-friction, physics-based puzzle distraction with a side of light level-creation, it holds up adequately even years after release. Go in calibrated, and it will not disappoint you. Kai, Scout Team

Eraser & Builder

Eraser & Builder

Feb 27, 2017CFK Co., Ltd.
GamerScout Says

Forty-eight physics puzzles asking you to guide a fragile egg home. Brutally modest in scope, disarmingly honest about what it is, and best appreciated at face value.

PC
Best Price Available
€0.36
at Kinguin
Lowest tracked: €0.30
Track this price

GamerScout Verdict

Best for players who want a no-frills, mouse-click physics puzzler and have zero expectations beyond that exact thing.

Compare Prices(7 stores)

KinguinBest price
StandardGlobalSteam KeyKey
€0.36
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€0.55
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€0.55
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€0.61-69%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€1.06-21%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€1.87-6%
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€1.99
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€1.99
Priced in EUR by the store
Buy

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Price History

Lowest tracked
€0.3030 Jun 2026
Current best
€0.36
Keyshops
€0.28€0.35€0.41€0.486 Jun29 Jun23 Jul15 Aug7 Sept
6 Jun — 7 Sept
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Screenshots & Media

About Eraser & Builder

I went into Eraser and Builder expecting almost nothing, and what I found was a pocket-sized physics puzzler that, at its best moments, has a quiet confidence most games five times its size lack. The core loop is as stripped-down as it gets: you manipulate the environment using mouse clicks to clear or construct paths, and your one job is to guide a helpless egg safely to the hen waiting at the other end of the level. That is the whole contract. No story, no score multiplier, no characters with backstories. Just physics, geometry, and a small round thing that absolutely must not crack. The Unity 3D physics engine doing the work here is not a marketing talking point bolted on for decoration. How objects fall, settle, and interact genuinely matters when you are trying to thread an egg through a gap you have manually carved. The deliberate weight to each interaction forces you to think one step ahead before you erase or place anything. The 48 included levels start gently and graduate into setups that require a real read of how chain reactions will play out. It is not a game that will tax veteran puzzle solvers for hours, but it does not pretend to be. Every level has a clear internal logic, and the satisfaction of getting it right the first try on a tricky stage is small but genuine. The Steam Workshop integration is the wildcard here. The community-level editor means the 48 base stages are technically just a starting library. Whether the Workshop remains active enough to give that promise real weight is a fair question for a 2017 title with a modest review count. What I can say is that the level editor exists, functions, and puts the same physics tools in the player's hands that the developers used. For a certain kind of person, that sandbox is the whole point. What holds it back is equally plain. The visual presentation is minimal to the point of austerity. There is no ambient soundtrack worth noting, no aesthetic identity that lingers after you close the window. The experience is closer to a browser-game session than a curated indie journey. Players hunting atmosphere, mood, or narrative texture will find the cupboard completely bare. This is a puzzle utility, not a puzzle experience. That framing is also its defence. Eraser and Builder knows exactly what it is, keeps its runtime honest, and delivers its modest promise without padding or pretence. For someone who wants a low-friction, physics-based puzzle distraction with a side of light level-creation, it holds up adequately even years after release. Go in calibrated, and it will not disappoint you.

Kai
Kai · Scout Team

Indie & narrative

Tags

singleplayerachievementstrading-cardsworkshoptier:sub-5Physics PuzzlerMouse-Only ControlsLevel EditorMinimalistShort-Form PuzzleEgg-Guiding MechanicCommunity LevelsCasual Brain Teaser

System Requirements

Minimum

OS
Windows 7 or higher
Memory
2 MB RAM
Storage
100 MB available space
Graphics
Discreet video card
Processor
2 Ghz
Sound Card
Direct Sound

Recommended

OS
Windows 7 or higher
Memory
2 MB RAM
Storage
100 MB available space
Graphics
Intel HD Graphics 4000 and higher, ATI Radeon HD-Series 4650 and higher, Nvidia GeForce 2xx-Series and up
Processor
2.4 Ghz Quad Core 2.0 (or higher)
Sound Card
Direct Sound

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Game Info

Developer
CFK Co., Ltd.
Publisher
CFK Co., Ltd.
Release Date
Feb 27, 2017

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Frequently asked questions about Eraser & Builder

How much does Eraser & Builder cost?

As of 7 September 2026, the cheapest in-stock offer for Eraser & Builder is €0.36 at Kinguin, out of 8 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy Eraser & Builder cheapest?

The lowest in-stock price we track for Eraser & Builder is €0.36 at Kinguin (7 September 2026). We compare 8 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is Eraser & Builder available on?

Eraser & Builder is available on PC.

When was Eraser & Builder released?

Eraser & Builder was released on 27 February 2017.

Who developed Eraser & Builder?

Eraser & Builder was developed by CFK Co., Ltd..