Company of Heroes pre-orders on Steam will grow in value as more sales targets are met.

In an increasingly common scheme, pre-orders for the RTS on Steam will unlock progressively better rewards.

Exact required numbers have not been revealed, but eager consumers have already unlocked the first tier, a set of exclusive Team Fortress 2 items featuring a German Officer’s Cap and Badge and a Soviet Commander’s Cap and Badge.

The second reward tier is a free, giftable copy of Warhammer 40,000: Dawn of War II: Retribution, which lends credence to rumours that THQ will offer Metro: 2033 as a pre-order incentive for Metro: Last Light.

The third and final tier grants purchasers a Company of Heroes 2 Commissar Chest, which packs in an XP boost, a unit boost, the Commander archetype, and a slab of in-game currency for future content.

Company of Heroes 2 is due on PC in March, having been delayed out of the final quarter of 2012. It is only the latest game to utilise Steam’s tiered pre-purchase scheme; its most recent peer is Tomb Raider.