String Theory

Where is the String Theory key cheapest?

The cheapest String Theory key that activates in the EU currently costs €7.51 at Kinguin. Keyfinder compares 1 offer from 1 shop for this price. That is 46% less than the Steam price of €13.79. Prices are refreshed hourly; region, edition and any checkout fees are shown on each offer.

What was the lowest String Theory key price in the last 32 days?

€7.51 on 11 Oct 2026, for the standard edition that activates in the EU. The highest daily low in that time was €7.51 on 11 Oct 2026; today the cheapest key costs €7.51.

Which String Theory keys activate in the EU?

1 offer is marked EU or Global and activates in Germany and the rest of the EU. Keys for other regions are listed separately. The keys on offer are for Steam.

What a game key is and how to read an offer

How do I activate the String Theory key?

The cheapest key activates on Steam. You redeem it there with the code the shop sends you after you pay.

How to redeem a Steam key

Is it safe to buy a String Theory key from Kinguin?

Before you pay, check three things on the offer: the region (EU or Global for Germany), the edition and any fee added at checkout. Keyfinder shows all three on every offer. Our Kinguin check covers who runs the shop, its fees and its regions.

Is Kinguin legit? Read our check