Wait for a Steam Sale. Call of Duty: Black Ops 3 frequently drops to $19.99 or less for the Zombies Chronicles Edition. You get access to custom Zombies maps (the Steam Workshop is a goldmine), stable online play, and zero risk of wiping your browser data.

Go to the Apunkagames website (URLs change frequently due to domain seizures). Search for "Black Ops 3." Avoid fake "Download Now" buttons that lead to adware.

: Follow the on-screen prompts to choose an installation directory with at least 60 GB to 150 GB of free space. Launch the Game

Finally, after what seemed like hours of navigating through the installation process, Jack reached the final challenge. He was presented with a virtual representation of the game's protagonist, Victor Reznov, who gave him a final message.