Sigma Theory: Global Cold War: Steam price vs key
Sigma Theory: Global Cold War costs €1.86 as a key at BuyCheapKeys, versus a regular price of €17.99 on the Steam Store: you save €16.13 (90% less). The key activates on your Steam account and it's exactly the same game (prices from October 4, 2026).
- Instant deliveryKey by email and in your account
- Full guaranteeReplacement or refund
- Secure paymentCard, PayPal, Google Pay, Apple Pay
- Activates on SteamSame game in your library
- Up to 4% cashbackWith the VIP Club
Should I buy Sigma Theory: Global Cold War now? A steal: buy it now
The key costs €16.13 less than the regular Steam price and is at its lowest recorded price.
Price score: 10/10 · The key is 90% below the regular Steam price.
The same game, for less
A Steam key gives you exactly the same as buying on Steam. Only the price changes.
Available Sigma Theory: Global Cold War keys
2 offers, sorted by price
Sigma Theory: Global Cold War price history
- Steam regular price€17.99
- BuyCheapKeys key€1.86
We've been tracking this game since October 3, 2026. The chart will appear once there are a few days of data.
How to activate the Sigma Theory: Global Cold War key
- 1
Buy the key
Choose the Sigma Theory: Global Cold War offer and pay. You get the key instantly.
- 2
Open Steam
Go to “Games” › “Activate a Product on Steam”.
- 3
Redeem and play
Paste the key and the game stays in your library forever.
Sigma Theory: Global Cold War FAQ
›How much is Sigma Theory: Global Cold War on Steam?
The regular Steam price of Sigma Theory: Global Cold War is €17.99. At BuyCheapKeys the Steam key costs €1.86, €16.13 less.
›Where to buy Sigma Theory: Global Cold War cheapest?
The cheapest option is the BuyCheapKeys Steam key for €1.86, 90% below the regular Steam price. Instant delivery and it activates on Steam.
›Is the Sigma Theory: Global Cold War key the same game as on Steam?
Yes. When you redeem the key, Sigma Theory: Global Cold War is added to your Steam account with achievements, cloud saves and updates, just as if you bought it on Steam.
›What is the lowest price for Sigma Theory: Global Cold War at BuyCheapKeys?
The lowest recorded price for the key at BuyCheapKeys is €1.86 (October 4, 2026). Today it costs €1.86.
›Will the Sigma Theory: Global Cold War key work in my country?
We list Global and Europe region keys. Each BuyCheapKeys product page tells you whether it can be activated in your country before you buy.
›Is it safe to buy from BuyCheapKeys?
Yes. Delivery is instant by email and in your account, we accept card, PayPal, Google Pay and Apple Pay, and every purchase is covered by a replacement or refund guarantee.
›Is Sigma Theory: Global Cold War worth it?
It has 77% positive reviews out of 892 on Steam (“Mostly Positive”), was released in 2019 and is developed by Mi-Clos Studio. Genres: Political Sim, Turn-Based, Management, Turn-Based Strategy.
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Sigma Theory: Global Cold War
€1.86