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Buy Halo 3

Buy Halo 3 PC Key

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This content requires the base game: Halo: The Master Chief Collection
★ ★ ★ ★ ★

Where to buy Halo 3 at the best price? As of 21 Aug 2026 the cheapest option is £9.66 at Gameseal, out of 4 offers across 4 stores. The range reaches £11.33, so the distance between the first and the last listing can be wide even with a handful of sellers. You activate the key in Steam or another client, and it is worth checking the price history first. This game has been cheaper before, on 95% of the days we have data for. A price alert will let you know when the next drop comes. This is an add-on, so you also need the base game to play it. That costs £19.99 today, which puts the pair at £29.65. On PC you buy a key that you activate in Steam or another client, and this is the widest market we track, with more than a quarter of games carrying a keyshop offer.

Release: 13 Jul 2020
Xbox Game Studios
Saber Interactive
Action
Metacritic:
88 8.1
Steam:
Very Positive (3k)
Buy in Official Store:
£9.99
Buy in Keyshops:
-8%
£9.66
In keyshops, it was cheaper on 95% of days with data.
See price history

Official Stores (1)

DRM:
Steam
Steam
Steam
Halo 3
Windows
12w ago
DRM:
Steam
Steam
£9.99
Shop now

Keyshops (3)

DRM:
Steam
Steam
Gameseal
Halo 3 (PC) Steam Gift - GLOBAL
Windows
4h ago
DRM:
Steam
Gameseal
£10.55 ~£9.66
-8%
-17% with SEAL17XDDcopy
-17% with SEAL17XDDcopy
Shop now
Kinguin
Halo 3 EU PC Steam Altergift
Windows
9h ago
DRM:
Steam
Kinguin
~£10.94
-8% with XD8DEALScopy
-8% with XD8DEALScopy
Shop now
CJS-CDKeys
Halo 3 Steam Key: Global (GLOBAL)
Windows
3d ago
DRM:
Steam
CJS-CDKeys
£11.33
Shop now

About Halo 3

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Halo 3 - about the game
Witness the Master Chief's return in the pulse-pounding conclusion to the original Halo trilogy, as he battles the Covenant and Flood to decide humanity's fate. An ancient secret buried under Africa's sands holds the power to shift the Human-Covenant war. This action game delivers 11 campaign missions packed with intense fights. Optimized for PC, it runs at up to 4K UHD and 60+ FPS, with mouse and keyboard controls, ultrawide support, and FOV adjustments. Jump into 24 multiplayer maps with an updated progression system, plus Forge for custom play and Theater to record and share clips. Action fans who crave campaign depth, multiplayer battles, and creative tools will find their match.

Halo 3 comes to PC as the next installment in Halo: The Master Chief Collection. Now optimized for PC, witness the Master Chief’s return to finish the fight between the Covenant, the Flood, and the entire Human race in this dramatic, pulse-pounding conclusion of the original Halo trilogy. With the fate of the galaxy hanging in the balance, the Master Chief returns to uncover an ancient secret hidden beneath the sands of Africa, which could hold the key to humanity’s salvation or destruction – an object that could change the tide of the Human-Covenant conflict.
Game Features:
  • PC Settings/Optimizations: Halo 3 is now optimized for PC and looking better than ever at up to 4k UHD and at 60+ FPS.* Other PC native settings include customizable mouse and keyboard support, ultrawide support, FOV customization, and more.
  • Campaign: Experience the next chapter in the Halo saga and fight your way through 11 unforgettable missions.
  • Multiplayer: Continue your Halo adventure with 24 multiplayer maps from the iconic Halo 3, featuring a completely updated progression system in Halo: The Master Chief Collection.
  • Forge & Theater: Create new ways to play with the iconic Forge tool and utilize the Theater to capture and share your favorite moments with the community

*Look to system requirements for guidance on hardware minimum specs to achieve performance metrics
Action Multi-player PvP Online PvP Family Sharing Co-op Single-player Downloadable Content Full controller support Online Co-op
Interface:
GermanEnglishSpanish - SpainSpanish - Latin AmericaFrenchItalianJapaneseKoreanPortuguese - PortugalSimplified ChineseTraditional Chinese
Audio:
GermanEnglishSpanish - SpainSpanish - Latin AmericaFrenchItalianJapaneseKoreanPortuguese - PortugalTraditional Chinese
Subtitles:
GermanEnglishSpanish - SpainSpanish - Latin AmericaFrenchItalianJapaneseKoreanPortuguese - PortugalSimplified ChineseTraditional Chinese

Age rating

Unavailable
Metacritic:
88 8.1
Steam:
Very Positive (3k)

System requirements

Minimum:

  • Processor: Intel Core i7-975 | AMD A12-9800 APU
  • Memory: 2 GB RAM
  • Graphics: GeForce GTS 450 | Radeon R7 Graphics
  • Storage: 55 GB available space
  • Additional Notes: 30 FPS on performance settings at 1920x1080

Recommended:

Halo 3 PC price history

See all
Historical low
Price history from official stores
£2.24
Steam
1 years ago
Currently lowest: £9.99 Steam
Price history from keyshops
£1.90
Gameseal
4 months ago
Currently lowest: £9.66 Gameseal
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FAQ

9 questions

Before you start looking for a cheap Halo 3 PC key, check the essentials. Developed by Saber Interactive. Published by Xbox Game Studios. PC released date: 13 Jul 2020. Genres: Action. Categories: Multi-player, PvP, Online PvP, Family Sharing, Co-op, Single-player, Downloadable Content, Full controller support, Online Co-op.

Q

Where to buy a cheap Halo 3 Steam key or CD key?

Using our price comparison and verified discount codes, you can buy a Halo 3 key for as low as £9.66. This deal is available at Gameseal and is among the cheapest offers on the market. All keys listed on XD.deals are delivered digitally and eligible for instant download after payment. Prices already include processing fees and applied promo codes, so you always see the lowest Halo 3 price on PC. Check the Halo 3 price history to buy at the best moment.

As of our last update (we refresh Steam pricing multiple times a day), the Halo 3 Steam price is £9.99. You can save an extra ~6% by paying with a discounted Steam gift card.

Our price tracker covers both official retailers and key marketplaces, so you can find Halo 3 on sale even outside seasonal promotions. We currently detect 4 active offers from official stores and keyshops. Check the table above, compare against the historical low, and set an alert so you never miss the next price drop.

Based on our data, Halo 3 is not currently available on GeForce NOW. You will need to run it locally on your PC. Browse games available on GeForce NOW.

The cheapest offer came most often from Gameseal: 101 of 181 days with data. The current price is high against its own history: it was cheaper on 95% of days with data. The price reached its historical low on only 1 day out of 181 days with data. We have recorded offers from 5 stores in total, and from 1 in the most recent reading.

Yes. Halo 3 has an official page on the Steam Store. You can also buy a Halo 3 Steam key from third-party sellers. Our price comparison currently includes 4 offers with Steam DRM. Pick one to ensure your Halo 3 download happens on Valve's platform.

Not at this time. Valve marks Halo 3 as Unsupported on Steam Deck. Keep an eye on XD.deals - we track Proton updates and community fixes. Browse games that are Steam Deck Verified or Steam Deck Playable.

According to our data Halo 3 is not currently available on PC Game Pass, EA Play or Ubisoft+. We are still filling in the catalogues of these services, so it is worth confirming the status at the source before you decide. If you are buying, XD.deals will help you find the lowest price.

No - XD.deals is not a store. We are a price-comparison service that tracks the best Halo 3 deals across official stores and verified keyshops. Click "Go to Store" next to any offer and you will be redirected to the retailer's website to complete your purchase.

Best prices for Halo 3

1 Gameseal Gameseal Keyshop
-8% £9.66
2 Steam Steam Official
£9.99
3 Kinguin Kinguin Keyshop
£10.94
4 CJS-CDKeys CJS-CDKeys Keyshop
£11.33

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