Amazon has Hitman Trilogy HD Premium Edition for Xbox 360 for $19.99 when you tweet a message with your Twitter account. Click HERE and click on the Tweet & Claim button. You will be prompted to login to your Twitter account and a promo code will be automatically applied to your Amazon account. Add Hitman Trilogy HD to cart. Total should be $19.99. The game sells for $39.99 at Best Buy
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