SpaceChem — cheap CD keys, compare prices
Is it worth buying?
- Reviews are excellent. (Metacritic 84 · Steam 92%)
- The price is above its low (was €3.01), but within a reasonable range. Notify me on a drop →
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
SpaceChem is a demanding puzzle game in which, as a reactor engineer, you design automated factories to synthesize chemical compounds. You program the paths of 'waldos' to grab, bond and transform atoms into increasingly complex molecules. The focus is on engineering-minded thinking and optimization, with a difficulty curve that challenges even veterans.
Did you know?
SpaceChem was created by Zach Barth's studio Zachtronics, which became renowned for a series of engineering and programming puzzle games such as Infinifactory and Opus Magnum.
Best price today
€3.57
all-time low: official €3.57 · keyshop €3.01 (+19%)
The cheapest SpaceChem key right now costs €3.57 at Steam — the best of 7 compared offers. The lowest price we have recorded for this game: €3.01.
The average low over the past 5 months was €3.62.
Prices as of
Steam best price Official store
GameSeal Marketplace
Gog Official store
Fanatical Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
SpaceChem prices by store 7
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €3.57 |
| GameSeal | Marketplace | €5.44 |
| Driffle | Marketplace | €5.56 |
| G2A | Marketplace | €5.64 |
| K4G | Marketplace | €6.24 |
| Gog | Official store | €8.92 |
| Fanatical | Official store | €9.99 |
Lowest — official stores
€3.57
Oct 2026
Lowest — keyshops
€3.01
Sept 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €3.57 | €5.44 |
| Sept 2026 | €8.57 | €3.01 |
| Aug 2026 | €8.54 | €3.38 |
| Jul 2026 | €8.71 | €3.40 |
| Jun 2026 | €4.89 | €4.73 |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: Steam, GameSeal, Driffle, G2A, K4G, Fanatical
- GOG key — on GOG.com → Redeem a code (or in GOG Galaxy: Add games & friends → Redeem GOG code). Stores with this activation: Gog
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All-time low so far: €3.01
System requirements
| Minimum | |
|---|---|
| OS | Windows XP SP3 / Vista / 7 / 8 / 10 |
| Processor | 2.0 GHz Processor |
| Memory | 1GB RAM |
| Graphics | frame buffer support recommended |
Similar games
Video reviews
21:45 SpaceChem Review
Matthewmatosis
11:09 Recommending SpaceChem
Matthewmatosis
8:28 Spacechem - review - GAMES IN EDUCATION (Chemistry)
Anton Petrov
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Can SpaceChem be played single-player?
Yes, SpaceChem is a single-player game.
What languages does SpaceChem support?
SpaceChem is available in: English, French, German, Russian, Italian, Japanese, Portuguese - Brazil, Spanish - Latin America.
Does SpaceChem use Steam Cloud saves?
Yes, SpaceChem uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a SpaceChem key?
The cheapest SpaceChem key is currently sold by Steam for €3.57. That is the best of 7 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €3.01.
How much does SpaceChem cost?
SpaceChem currently costs from €3.57 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.