XCOM: Enemy Unknown - Elite Soldier Pack

Elite Soldier Pack is the first DLC for XCOM: Enemy Unknown and requires the original game to play. It adds cosmetic bonuses to the game:

• Classic X-COM Soldier: a new recruit inspired by the original X-COM: UFO Defense
• Complete Color Customization: a variety of colors and tints for all armor sets to customize their squad's look
• Soldier Deco Packs: several aesthetic upgrades to armor suits, including the Hyperion and Reaper soldier armor kits

It was included as a bonus with the pre-orders of some releases of the original game and eventually made available as DLC for everyone as well.