CDKeys offers Steam downloads of Rise of the Tomb Raider: 20 Year Celebration for Windows for $22.49. That's $2 below our November mention and the lowest price we've seen. (It's the best deal now by $18.) Beyond the base game, it includes the new "Blood Ties" DLC, all previous DLC, co-op mode, survivor mode difficulty, and in-game items and skins.

Note: New customers can provide an email address on the CDKeys Facebook page to get a unique coupon code that cuts an extra 5% off.

Update: The price has increased to $24.99.