Square Enix announced today that after a short wait, pre-order customers of Hitman: Absolution will now have access to the add-on title Hitman: Sniper Challenge free of charge.
However, you wont be able to get the game at just any retailers. The list of participating stores is larger in other places, but in the United States, you'll have to pre-order at GameStop if you want to get your mitts on the Sniper Challenge add-on.
Sniper Challenge has been a major focus of Square Enix's marketing campaign for Hitman: Absolution, and they've been holding regular tournaments and competitions. In fact, they just announced more details on their UK tournament yesterday which will get the winner's face in the game.