The BitLocker drive encryption feature has been reported to cause issues with the CD detection, so try removing any encrypted external drives if you encounter problems. Localized installation CDs and expansion packs will not work. Please keep in mind that the CD extracting algorithm is hard-coded to those CD-Images. TD + Covert Operations (3 files), Red Alert + Aftermath + Counterstrike (4 files), Tiberian Sun + Firestorm (1 file) Red Alert and Tiberian Dawn have been released by EA Games as freeware.

Open 'Manage Content' from the main game menu and press the 'Detect Disc or Installation' button. OpenRA can automatically copy this additional content if you have the original games installed via C&C The Ultimate Collection on Origin (Windows only), or insert/mount a CD/DVD/disc image of the original freeware or The First Decade releases.

For the full experience, you should install the complete asset set from the original game CD. On the first run the game will ask whether you want to download a stripped down version automatically as both the full motion video and music soundtrack are optional.

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