Amazon.com is having a day of video game-themed Lightning Deals to go with their Gold Box Deal of the Day.

Beginning at 8 AM Pacific time (11 AM Eastern), The Serious Sam Collection for the Xbox 360, which has a list price of $39.99 (USD), will be discounted to a mere $19.99. The collection contains four games in the series: Serious Sam HD: The First Encounter, Serious Sam HD: The Second Encounter, Serious Sam 3: BFE (including the Jewel of the Nile DLC pack), and Serious Sam: Double D XXL. Series creator Croteam developed the first three, while Mommy’s Best Games developed Double D XXL.

The deal will run for two hours, or while supplies last. We’ll keep you updated on the latest from this sale, so stay tuned for more announcements throughout the day.