GOG.com announces "one promo to rule them all" to conclude their holiday sale, saying the "number of games you can get today up to 75% off is simply mind-boggling." The sale items are on the GOG.com front page, and they note that in addition to all these 75% discounts, most of the rest of their catalog is still on sale for half-off for the next 24 hours. Meanwhile, it's day fourteen of the Steam holiday sale. Here are today's specials:

• Dark Souls: Prepare To Die Edition on Steam. Save 50%.
• Magicka on Steam. Save 75%.
• Painkiller Franchise on Steam. Save 50-75%.
• Sniper Elite V2 on Steam. Save 50%.
• Star Wars: Knights of the Old Republic on Steam. Save 75%.
• Tomb Raider Collection on Steam. Save 75%.