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Buy Tomb Raider (not Steam) on Amazon and get Hitman: Absolution (Steam) for free. Not as good as the Borderlands 2 + XCOM for $23, but still okay value.
In Amazon's own words:
"Buy Tomb Raider PC Download and get Hitman: Absolution PC Download Free
From June 20-26, buy the digital download of Tomb Raider and get Hitman: Absolution free. Within 48 hours after completing your purchase for Tomb Raider, you will receive an email notifying you of your free download. Place your order for Hitman: Absolution and a discount will be applied, reducing the cost of this game to free. Credit must be used by June 19, 2014"
Standard Amazon digital game procedure applies (i.e. US address).
Not a good deal, look back on previous:
Tomb Raider is often <$20, Hitman is often <$10