On Steam if you pre-purchase XCOM: Enemy Unknown you get something described as an "Elite Soldier Pack":
The Elite Soldier Pack will provide the ultimate tools for soldier customization in XCOM: Enemy Unknown, including:
Classic XCOM Soldier
Players will instantly receive a new recruit in their barracks inspired by the original X-COM: UFO Defense. The iconic soldier with the blonde, flattop hairstyle will return fully modernized.
Soldier Deco packs
Players can customize their soldier with several aesthetic upgrades to armor suits, including the new Hyperion and Reaper soldier armor kits.
Complete color customization
A variety of colors and tints for all armor sets in the game allow players complete control to customize their squad’s look.
Is this pre-order bundle exclusive to Steam or is it possible to get this pre-order bonus (or similar) from other digital retailers?
If not, are there any other pre-order bundles worth consideration?