Call of Duty: Modern Warfare II

Warzone 2.0 DMZ

How to get a Building 21 Keycard and enter Building 21 map

By

Return to page “How to get a Building 21 Keycard and enter Building 21 map”

No Comments

Subscribe Now to Remove Ads

Guide Information

Publisher
Activision
Platforms,
PC, PS4, PS5, XB One, XB X|S
Genre
FPS
Guide Release
17 October 2022
Last Updated
16 November 2023
Version History
Guide Author

This guide for Call of Duty: Modern Warfare 2 includes the following:

How To Get All Mission Exclusive Trophy/Achievements
Best Gun Loadouts for Multiplayer
How To Get All Camo’s in Multiplayer
Tips & Tricks for Multiplayer Game Modes
Details on how to get 3 Stars on all Spec Ops Missions (Coming Soon)

Get a Gamer Guides Premium account:

Remove ads
Custom Favorites
Support the authors
And many more special features coming soon...

Subscribe Now to Remove Ads