Halo 3 — cheap CD keys, compare prices
Is it worth buying?
- The price is at or near its all-time low — a good time to buy.
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
Halo 3 arrived on PC as part of the Halo: The Master Chief Collection, bringing back the Master Chief to end a war pitting the Covenant against the Flood and all of humanity. This entry wraps up the first three Halo games with a tense, dramatic finale. 343 Industries, Ruffian Games, and Saber Interactive worked on the game, Xbox Game Studios published it, and the PC version arrived in 2020.
Best price today
€9.99
all-time low: official €9.99 · keyshop €11.51 near low
The cheapest Halo 3 key right now costs €9.99 at Steam. The lowest price we have recorded for this game: €9.99.
The average low over the past 5 months was €9.99.
Prices as of
Steam best price Official store
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 (1)
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.
Lowest — official stores
€9.99
Jul 2026
Lowest — keyshops
€11.51
Jul 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €9.99 | — |
| Sept 2026 | €9.99 | €11.97 |
| Aug 2026 | €9.99 | €11.97 |
| Jul 2026 | €9.99 | €11.51 |
| Jun 2026 | €9.99 | — |
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
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All-time low so far: €9.99
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FAQ
Where is the cheapest place to buy a Halo 3 key?
The cheapest Halo 3 key is currently sold by Steam for €9.99. The lowest price we have ever recorded for this game: €9.99.
How much does Halo 3 cost?
Halo 3 currently costs from €9.99 — 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.