Before your first match of Modern Warfare 4: finish the download with the right content packs, sign in on the same Activision account you used for the beta or early access, check the rewards waiting on it, and set up Tactical Sprint. Then push for level 4, because that's where Create-a-Class opens.
Most of that takes five minutes, and skipping it costs you more. Early access weapon levels, campaign tokens and beta rewards all sit on your account, and the sprint setting changed since the beta. Checked against Infinity Ward's launch patch notes and Activision's Ready for Launch progression post.
Tactical Sprint isn't standard any more. It sits on Blood Rush, now a second-tier perk, and Infinity Ward removed the old sprint-out penalty to make the slot worth it. With Blood Rush equipped, pressing sprint goes straight into Tactical Sprint by default.
If you want the old double-tap behaviour, change it under Movement in the Advanced Settings. Do it before your first match; muscle memory from the beta will fight you otherwise.
Both feed the same Soldier Rank, so it's about what you want to unlock. Multiplayer gets you to Create-a-Class at level 4 fastest. DMZ has its own 1 to 70 track that only DMZ deployments can raise, and its XP counts toward your Soldier Rank too.
Is the new Warzone live with MW4?
Not yet. The new Warzone arrives with Season 1, shortly after launch. Choosing Warzone during setup before then installs the current live version.
Do I keep my DMZ early access progress?
Yes. Early access ran on the full game, so your DMZ level stays, and Activision confirms the weapon levels, attachments and camos you earned carry into multiplayer. The player XP already counts toward your Soldier Rank.
Can I play with friends on other platforms?
Yes. MW4 supports crossplay, and your progress follows your Activision account rather than the console or launcher you play on.
