Mainframe Defenders key prices
The cheapest Mainframe Defenders key for EU buyers right now is €0.49 at GOG (GOG, Germany store). We compare 4 stores that sell to buyers in the EU.
- 4 stores compared
- Checked 27 Oct, 19:27 UTC
- Price changed 23 Oct 2026
- Tracked since 10 Sep 2026
- Released
- 25 Feb, 2020
- Developer
- Synthetic Domain
- Publisher
- Synthetic Domain
- Genres
- Indie, RPG, Strategy
- Players say
- Very positive — 88% of 796 reviews on Steam
Prices for EU buyers
| Store | Activation | Region | Price | Discount | Checked | |
|---|---|---|---|---|---|---|
| GOGOfficial storeBest | GOG | ✓ Germany store | €0.49 | −90% | 27 Oct, 18:25 UTC | Go to store |
| KeydraKey reseller | GOG | ✓ Global | €3.07 | 27 Oct, 19:27 UTC | Go to store | |
| SteamOfficial store | Steam | ✓ Germany store | €4.90 | 27 Oct, 19:27 UTC | Go to store | |
| Humble StoreOfficial store | Steam | ✓ Germany store | €4.99 | 27 Oct, 18:45 UTC | Go to store |
Marketplace and reseller prices are the lowest offer at the time of the check. On marketplaces the seller is a third party: check the seller's rating before buying.
Cheapest in pounds and dollars
The same game at stores that sell to buyers in the UK and the US, in the price they charge there. We do not convert: these are the amounts at the checkout. Most key marketplaces publish euro prices only, so pound and dollar prices come from official stores, authorised resellers and Kinguin, and can be higher than the EU price above. That is the reach of our data, not the state of the market.
Prices for UK buyers
| Store | Activation | Region | Price | Discount | Checked | |
|---|---|---|---|---|---|---|
| GOGOfficial storeBest | GOG | ✓ United Kingdom store | £0.49 | −90% | 27 Oct, 18:25 UTC | Go to store |
| SteamOfficial store | Steam | ✓ United Kingdom store | £4.40 | 27 Oct, 19:27 UTC | Go to store |
In GBP, the amount at the checkout: we do not convert. Only offers you can buy from the UK: that country's storefront, or a key whose region activates there. Standard edition, PC.
Prices for US buyers
| Store | Activation | Region | Price | Discount | Checked | |
|---|---|---|---|---|---|---|
| GOGOfficial storeBest | GOG | ✓ United States store | $0.59 | −90% | 27 Oct, 18:25 UTC | Go to store |
| SteamOfficial store | Steam | ✓ United States store | $5.99 | 27 Oct, 19:27 UTC | Go to store |
In USD, the amount at the checkout: we do not convert. Only offers you can buy from the US: that country's storefront, or a key whose region activates there. Standard edition, PC.
Offers are sorted by price. Links to stores may be affiliate links; they never change the order. How we make money.
Official prices in other countries
Steam and GOG set their own price for each country. Which one you pay depends on your account and location.
| Store | Country | Price | In euros |
|---|---|---|---|
| GOG | Hungary | 130.00 HUF | ≈ €0.35 |
| GOG | Romania | 1.95 RON | ≈ €0.36 |
| GOG | Norway | 4.00 NOK | ≈ €0.38 |
| GOG | Czechia | 10.00 CZK | ≈ €0.41 |
| GOG | Denmark | 3.50 DKK | ≈ €0.47 |
| GOG | Sweden | 5.50 SEK | ≈ €0.49 |
| GOG | Poland | 2.19 PLN | ≈ €0.50 |
| GOG | United States | $0.59 | ≈ €0.53 |
| GOG | United Kingdom | £0.49 | ≈ €0.58 |
| GOG | Switzerland | 0.59 CHF | ≈ €0.64 |
| Steam | Poland | 22.40 PLN | ≈ €5.09 |
| Steam | United Kingdom | £4.40 | ≈ €5.25 |
| Steam | Norway | 55.00 NOK | ≈ €5.26 |
| Steam | United States | $5.99 | ≈ €5.35 |
| Steam | Switzerland | 5.40 CHF | ≈ €5.84 |
Price history
Daily lowest price for EU buyers, 48 days so far.
€0.4927 Oct 2026Point at the chart to read any day
Lowest price we have recorded for EU buyers: €0.49 at GOG on 16 Sep 2026.
Daily lowest price for UK buyers in GBP, 48 days so far.
£0.4927 Oct 2026Point at the chart to read any day
Daily lowest price for US buyers in USD, 48 days so far.
$0.5927 Oct 2026Point at the chart to read any day
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