This holiday season, Xbox 360 owners can snag Serious Sam games and their DLC off Xbox LIVE Arcade for half-price. None of that "up to 50% off" nonsense either; all Serious Sam content on XBLA will be marked down 50% during the holiday season.
What this specifically covers is Serious Sam 3: BFE, Serious Sam 3: Jewel of the Nile, Serious Sam HD: First Encounter, and Second Encounter. Overall, not a bad deal, especially if you happen to enjoy the series.
If you're not already convinced, we do have a pretty magical trailer that'll properly sell the game(s) to non-believers. Kind of. I mean, if you've got small children in the room, you may want to consider shielding their eyes for this.
Serious Sam XBLA trailer - YouTube
What a lovely holiday message. Makes me all warm and fuzzy inside.