Arma 3 Accounts

Use the credentials you received (directly or via an external website) and log into the account.
Make sure that the content on the account is correct (correct edition of the game, no playtime etc)
Change the credentials to make the account your own:
Change the email
Change the password
Add 2FA (Steam Guard)
Please note that it may not be possible to add the purchased account to an existing Steam Family and to enable Family Sharing.
The account should be used as a way of accessing the game/content you are interested in. It is not recommended to use it as your main account, as you might have issues with making purchases on it.
Applying any changes to the purchased account, such as adding a payment method or changing the region, may result in the account being banned. In such cases, no refund is applicable.

Includes:
• Arma 3 base game
• Arma 3 Apex
• Arma 3 Helicopters
• Arma 3 Karts
• Arma 3 Marksmen
• Arma 3 Zeus

Arma 3 Apex
With the brand new 100 km² South Pacific island Tanoa, a co-op campaign, and new vehicles, weapons, and characters at the heart of Arma 3 Apex, this upcoming expansion aims to dig into the theme of near-future combat, expand the main game's line-up of more familiar/modern-day armaments, and introduce new vehicle classes, such as VTOL aircraft and Light Strike Vehicles.

Arma 3
Experience true combat gameplay in a massive military sandbox. Deploying a wide variety of single- and multiplayer content, over 20 vehicles and 40 weapons, and limitless opportunities for content creation, this is the PC's premier military game. Authentic, diverse, open - Arma 3 sends you to war.

Arma 3 Helicopters
Fly the brand-new CH-67 Huron and Mi-290 Taru heavy-lift helicopters, and master Sling Loading to provide ground support in the Arma 3 Helicopters DLC.

Arma 3 Karts
Start your engines - this is Arma 3 Karts! When we unveiled our 2014 April Fools joke via the Splendid Split parody video, some of you were quite keen for us to release the go-karts package for real. And here it is, for everyone to try. Enjoy this little sidestep in our typically military sandbox!

Arma 3 Marksmen
Hone your shooting skills and engage in ranged combat with the seven new weapons in the Arma 3 Marksmen DLC.

Arma 3 Zeus
Arma 3 Zeus is a new form of multiplayer where improvisation is the key to success. Inspired by popular tabletop games such as 'Dungeons & Dragons', this free DLC for Arma 3 enables you to assume the role of Zeus, a game master with the ability to curate the multiplayer experience of others. Wielding an intuitive real-time editor, you can invent new stories, challenges and locations. The result is always unique, always dynamic combat - for both Zeus and those with boots on the ground. Your rules, your war.