Paradox Interactive games, keys and accounts
Paradox Interactive is a Swedish publisher known above all for grand strategy: long campaigns across history, deep simulation and years of expansions. Its name sits on Crusader Kings III, Stellaris, Hearts of Iron IV and Europa Universalis IV and V.
The catalogue here spans those grand strategy staples alongside city building with Cities: Skylines and Cities: Skylines II, fantasy empires in Age of Wonders 4 and role playing in Pillars of Eternity.
Paradox Interactive
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Europa Universalis V Premium Edition Steam Digital Key
STEAM KEY • GLOBAL$80.88
$79.93
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Europa Universalis V Steam Digital Key
STEAM KEY • GLOBAL$57.77
$50.35
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Stellaris – BioGenesis DLC RoW Steam Digital Key
STEAM KEY • ROW$23.10
$16.05
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Victoria 3 Steam Digital Key
STEAM KEY • GLOBAL$46.21
$13.90
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Stellaris – Galactic Paragons DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$7.96
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Age of Wonders 4 Steam Digital Key
STEAM KEY • GLOBAL$57.77
$19.78
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Crusader Kings III – Tours & Tournaments DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$19.64
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Europa Universalis IV – Domination DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$18.55
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Stellaris – Toxoids Species Pack DLC Steam Digital Key
STEAM KEY • GLOBAL$17.32
$5.70
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Hearts of Iron IV: Cadet Edition RoW Steam Digital Key
STEAM KEY • ROW$46.21
$21.76
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Age of Wonders 4 Premium Edition Steam Digital Key
STEAM KEY • GLOBAL$80.88
$42.28
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Millennia Steam Digital Key
STEAM KEY • GLOBAL$57.77
$16.28
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Stellaris – First Contact Story Pack DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$8.25
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Knights of Honor II: Sovereign Steam Digital Key
STEAM KEY • GLOBAL$46.21
$10.18
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Hearts of Iron IV – No Step Back DLC Steam СD Digital Key
STEAM KEY • GLOBAL$17.32
$11.09
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Cities: Skylines II Steam Digital Key
STEAM KEY • GLOBAL$57.77
$34.14
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Europa Universalis IV – Emperor DLC Steam Digital Key
STEAM KEY • GLOBAL$17.32
$13.97
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Hearts of Iron IV – By Blood Alone DLC Steam Digital Key
STEAM KEY • GLOBAL$11.54
$11.09
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Crusader Kings III Royal Edition Steam Digital Key
STEAM KEY • GLOBAL$92.43
$83.84
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Crusader Kings III EU Steam Digital Key
STEAM KEY • EUROPE$46.21
$14.75
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Hearts of Iron IV Steam Digital Key
STEAM KEY • GLOBAL$34.66
$20.94
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Stellaris Steam Digital Key
STEAM KEY • GLOBAL$34.66
$12.82
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Stellaris GOG Digital Key
GOG.COM KEY • GLOBAL$34.66
$19.67
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Victoria 3 – Volume 3 DLC Steam Digital Key
STEAM KEY • GLOBAL$57.77
$49.47
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Transport Fever 3 Steam Digital Key
STEAM KEY • GLOBAL$57.77
$43.61
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Hearts of Iron IV EU Steam Digital Key
STEAM KEY • EUROPE$34.66
$19.03
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Transport Fever 3 Deluxe Edition Steam Digital Key
STEAM KEY • GLOBAL$69.32
$56.33
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Crusader Kings III Steam Digital Key
STEAM KEY • GLOBAL$46.21
$14.62
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Europa Universalis IV Steam Digital Key
STEAM KEY • GLOBAL$34.66
$4.82
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Pillars of Eternity Definitive Edition Steam Digital Key
STEAM KEY • GLOBAL$34.66
$4.16
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Age of Wonders 4 – Expansion Pass 4 DLC Steam Digital Key
STEAM KEY • GLOBAL$57.77
$50.44
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Stellaris – BioGenesis Steam Digital Key
STEAM KEY • GLOBAL$23.10
$15.24
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Crusader Kings III – Chapter V Steam Digital Key
STEAM KEY • GLOBAL$46.21
$39.20
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Hearts of Iron IV – Götterdämmerung DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$17.46
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Hearts of Iron IV – La Résistance DLC EU Steam Digital Key
STEAM KEY • EUROPE$11.54
$11.06
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Crusader Kings III – Roads to Power DLC Steam Digital Key
STEAM KEY • GLOBAL$23.10
$19.28
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Across the Obelisk Steam Digital Key
STEAM KEY • GLOBAL$46.21
$3.22
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Hearts of Iron IV – No Compromise, No Surrender Expansion DLC Steam Digital Key
STEAM KEY • GLOBAL$28.88
$24.04
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Cities: Skylines II Starter Edition Steam Digital Key
STEAM KEY • GLOBAL$69.32
$55.71
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Stellaris – Federations DLC Steam Digital Key
STEAM KEY • GLOBAL$17.32
$9.80
About Paradox Interactive
Paradox Interactive publishes and develops games built for players who like systems. Paradox Development Studio is behind the historical grand strategy line, including Europa Universalis IV, Europa Universalis V, Victoria 3, Hearts of Iron IV and Crusader Kings III, as well as the science fiction empire builder Stellaris.
Beyond its in-house work, Paradox Interactive publishes games from other teams: Colossal Order on the Cities: Skylines series, Triumph Studios on Age of Wonders 4, Harebrained Schemes, Double Eleven and Obsidian Entertainment, whose Pillars of Eternity brings party based role playing to the range. Titles in the catalogue span releases from 2011 to 2025.
Games in the catalogue
The core of the range is strategy: Crusader Kings III, Stellaris, Europa Universalis IV and V, Victoria 3, Hearts of Iron IV, Age of Wonders 4, Millennia, Knights of Honor II: Sovereign and the tactical battles of Mechabellum. City building and management sit alongside them in Cities: Skylines and Cities: Skylines II, with role playing and adventure covered by Pillars of Eternity and the co-operative chaos of Magicka 2.
Because Paradox Interactive games are supported with long expansion lines, much of the simulation and management catalogue consists of DLC and expansion packs that add nations, mechanics and content to a base game you already own.
Most titles are for PC on Steam, with some also covering GOG.com and Microsoft. Console entries appear on Xbox One, Xbox Series X|S, PlayStation 4 and PlayStation 5, depending on the game.
How buying works
Each game activates on the platform named in its listing, so a Steam title is redeemed in the Steam client and a console title on the matching store account. If you have not redeemed a code before, the Steam key activation guide walks through the steps.
Most games come as keys, and some come as accounts instead. A key is a code you redeem on your own account; an account comes with the game already on it and is signed into rather than redeemed. Games are sold per region, and a key has to match the region of the account it is being activated on, so check the listing region before buying: region locking is explained in more detail in the help centre.
Common questions
- Which platform do these games activate on?
- Each listing states its platform. Most Paradox Interactive titles activate on Steam for PC, with others on GOG.com, Microsoft, Xbox One, Xbox Series X|S, PlayStation 4 or PlayStation 5.
- Will a key work in another country?
- Only if the region matches. A key must be redeemed on an account set to the region the key is intended for, so compare your account region with the listing region before ordering.
- What is the difference between a key and an account?
- A key is a code you redeem on your own account, so the game joins your library. An account comes with the game already on it and you sign in with the details provided.
- Do expansions need the base game?
- Yes. DLC and expansions for titles such as Crusader Kings III or Cities: Skylines II add to the base game and require it on the same account and platform.
- When do I receive my key or account details?
- The key or account details are delivered to your order once payment completes.