CorePack has been inactive for several years. Finding an "official" link today is difficult, and many sites claiming to host it may actually be hosting malware.
Usually bundled with the Havoc, Ascendance, Supremacy, and Reckoning map packs. callofdutyadvancedwarfarerepackbycorepack
The fan-favorite co-op mode was included in the cracked/repacked versions. Key Features of Advanced Warfare CorePack has been inactive for several years
A gritty, celebrity-voiced survival mode that provided a fresh take on the classic Zombies formula. Risks and Considerations callofdutyadvancedwarfarerepackbycorepack
Call of Duty: Advanced Warfare – Is the CorePack Repack Still Worth It?
Whether you are playing a repack or the original Steam version, Advanced Warfare remains a unique entry in the series:
Allowing users to skip "extra" files like 4K videos or additional languages.