Kerbal Space Program — cheap CD keys, compare prices
Is it worth buying?
- Reviews are excellent. (Metacritic 88 · Steam 96%)
- The price is above its low (was €4.57), 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
Kerbal Space Program is a space-program simulation where you take charge of the green alien Kerbals and assemble rockets and craft from hundreds of parts. Everything flies (or explodes) according to realistic aerodynamics and orbital physics, so through plenty of trial, error and comedic failures you end up learning real rocket science.
Did you know?
Its orbital mechanics are realistic enough that NASA and SpaceX engineers have praised it, and NASA even partnered with the developers on a dedicated mission pack.
Best price today
€4.91
lowest in tracked period: official €9.24 · keyshop €4.57 (+7%)
On Steam: €9.24 — you save 47% here
The cheapest Kerbal Space Program key right now costs €4.91 at K4G — the best of 34 compared offers. The lowest price we have recorded for this game: €4.57. The cheapest official store price is €9.24 at Steam.
The average low over the past 5 months was €6.58.
↳ chosen by the region label on the key — not a guarantee
Prices as of
K4G Marketplace
Driffle Marketplace
GameSeal Marketplace
K4G Marketplace
K4G Marketplace
K4G Marketplace
Kinguin Marketplace
Kinguin Marketplace
G2A Marketplace
G2A Marketplace
G2A Marketplace
G2A Marketplace
G2A Marketplace
Steam Official store
Driffle Marketplace
Kinguin Marketplace
K4G Marketplace
Driffle Marketplace
Kinguin Marketplace
GameSeal Marketplace
GameSeal Marketplace
Kinguin Marketplace
G2A Marketplace
G2A Marketplace
Instant Gaming Marketplace
Fanatical Official store
Gog Official store
Driffle Marketplace
Driffle Marketplace
K4G Marketplace
Driffle Marketplace
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
There are also offers of another kind (Gift) — show (2)
These are not ordinary keys. A gift is usually region-locked and arrives through someone else's account — if the region does not match, the game will not activate. An account means you get someone else's login: the game never becomes yours, and it breaks Steam's rules. A DLC or a bundle is not the base game. That is why none of them count towards the price at the top of the page.
Kerbal Space Program prices by store 11
| Store | Type | Price |
|---|---|---|
| K4G | Marketplace | €4.91 |
| Driffle | Marketplace | €4.96 |
| GameSeal | Marketplace | €5.11 |
| G2A | Marketplace | €5.14 |
| Kinguin | Marketplace | €5.51 |
| Loaded | Marketplace | €7.89 |
| Instant Gaming | Marketplace | €7.99 |
| Steam | Official store | €9.24 |
| Gamivo | Marketplace | €11.63 |
| Fanatical | Official store | €33.29 |
| Gog | Official store | €35.69 |
Lowest — official stores
€9.24
Jul 2026
Lowest — keyshops
€4.93
Sept 2026
Price history
last 73 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €9.24 | €4.84 |
| Sept 2026 | €9.24 | €4.57 |
| Aug 2026 | €9.24 | €4.99 |
| Jul 2026 | €9.24 | — |
| Jun 2026 | €9.25 | — |
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: K4G, Driffle, GameSeal, G2A, Kinguin, Loaded, Instant Gaming, Steam, Gamivo, Fanatical
- GOG key — on GOG.com → Redeem a code (or in GOG Galaxy: Add games & friends → Redeem GOG code). Stores with this activation: Driffle, Gog
Price alert Catch alert Price alert
Confirm in our Telegram bot — no account, no spam.
All-time low so far: €4.57
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 7 SP1+ | Windows 10 64-bit |
| Processor | Core 2 Duo 2.0 Ghz | Core i5 |
| Memory | 4 GB RAM | 8 GB RAM |
| Graphics | DX10 (SM 4.0) capable, 512MB VRAM | DX10 (SM 4.0) capable, 1GB VRAM |
Similar games
Video reviews
4:07 Kerbal Space Program Video Review
IGN
4:47 Kerbal Space Program - Review
GameSpot
5:22 Kerbal Space Program 1 vs Kerbal Space Program 2 | Which One Should You Buy?
Matt Lowne
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Can Kerbal Space Program be played single-player?
Yes, Kerbal Space Program is a single-player game.
What languages does Kerbal Space Program support?
Kerbal Space Program is available in: English, Spanish - Spain, Simplified Chinese, Japanese, Russian, French, Italian, German and 1 more.
Does Kerbal Space Program use Steam Cloud saves?
Yes, Kerbal Space Program uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a Kerbal Space Program key?
The cheapest Kerbal Space Program key is currently sold by K4G for €4.91. That is the best of 34 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €4.57.
How much does Kerbal Space Program cost?
Kerbal Space Program currently costs from €4.91 — the cheapest offer across the stores we track. For comparison, the game costs €9.24 on Steam, so buying a key saves you about 47%.
Is K4G an official store or a keyshop?
K4G is a keyshop (marketplace) where independent sellers list keys, so prices are often lower than in official stores. Every offer on ulov.gg is clearly labeled with its store type.
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.