To use your physical retail code or product key for , you must redeem it through Steam. The old retail servers (Quazal/Relic Online) have long been shut down, meaning physical discs can no longer validate themselves independently or access multiplayer.
: The expansion doubles the strategic possibilities by introducing new doctrines like Royal Canadian Artillery for the British and Scorched Earth Tactics for the Germans. Technical Tips: Keys & Activation Company of Heroes: Opposing Fronts Review - GameSpot 26 Sept 2007 — Company of Heroes: Opposing Fronts To use your
Locating the key: Look on the back of the game manual, inside the DVD case, or on a sticker placed directly on the disc sleeve. Why Were These Keys Necessary