The CODEX release is a specific version of the update, which suggests that it's a pre-activated, pirated copy of the game. While I don't condone piracy, I understand that some users may be interested in learning about the update.

Battletech Heavy Metal Update V1 8 1-codex -

The CODEX release is a specific version of the update, which suggests that it's a pre-activated, pirated copy of the game. While I don't condone piracy, I understand that some users may be interested in learning about the update.