There is no legal "free" download for the full original Deluxe Edition. Beware of "free download" sites, which often harbor malware or pirated content.
Historical copies for "borrowing" or streaming are sometimes archived on Internet Archive , though these are primarily for preservation and may require original license keys to function fully. 3. System Requirements (Classic 2004 Edition)
Use the launcher (Steam/GOG) to download the core files.
If you are looking for a free experience, Call of Duty: Warzone is the official free-to-play battle royale title available on the Microsoft Store and other PC launchers.