Found inside a physical game box, usually printed on a manual or a sticker. These were originally intended for the legacy non-Steam version of the game that used Relic Online. Core Differences in Application Digital Product Key Retail Code (Legacy) Primary Platform Steam / Direct Publisher Physical Disk / Relic Online Activation Redeemable directly via the "Activate a Product" tool May require a conversion tool or legacy support In-Game Content Unlocks specific content (e.g., British/Panzer Elite) Often acts as a "standalone" or "addon" depending on input New Steam Version Automatically grants access to the "New Steam Version" Older keys can often be added to Steam to grant the same Activating a Retail Code on Steam
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