The legendary Sam "Serious" Stone returns to battle the relentless hordes of Mental's army in glorious high definition on Xbox LIVE Arcade in Serious Sam HD: The First Encounter. Based on the original indie arcade shooter sensation Serious Sam: The First Encounter, Serious Sam HD features stunningly redesigned visuals, over-the-top action, and intense online co-op for up to four players.

“Serious Sam HD: The First Encounter” goes high definition on January 13th at 9 a.m. GMT (2:00 a.m. PDT).

Published by Majesco Entertainment and developed by Croteam, “Serious Sam HD: The First Encounter” will be available for 1200 Microsoft Points everywhere and is rated M for Mature by the ESRB. For more details on “Serious Sam HD: The First Encounter” you can visit: http://www.xbox.com/games/s/serioussamxbla/ or http://www.xblarcade.com/node/2431

The struggle to protect Earth and prevent the end of humanity continues in the first downloadable content for 0 Day Attack on Earth. After defending New York’s Manhattan skyline, freeing the mammoth metropolis of Tokyo, and rescuing the historic and beautiful Paris, your next mission awaits in London. Seven new stages to clear! The battles over the Thames are intense with new, huge enemies swarming the skies. This map pack is for use only in Single Player Mode and Co-op Mode for 2-4 players. Maps are not playable in Capture the Flag or Control Point modes for 2-8 players. The London Map Pack costs 560 Microsoft Points.

And also this week, Magic: The Gathering — Duels of the Planeswalkers brings the world’s premier trading card game to your living room! Play single and multiplayer campaign modes, test your skills with unique challenges, and engage online opponents via Xbox LIVE. With multiple game modes, an interactive tutorial, leaderboards, and achievements, Duels of the Planeswalkers has something for everyone!

Magic: The Gathering — Duels of the Planeswalkers is the Deal of the Week running from Monday, January 11th to Sunday, January 17th. During this time Xbox LIVE Gold Members can pick up Magic: The Gathering — Duels of the Planeswalkers for 400 Microsoft Points. That’s 50% of the regular price of 800 Microsoft Points. With the extra points you saved you can pick up some of the game’s additional contents packs!

And now that you are informed, tell your friends by clicking on the reTweet button below and perhaps they’ll pick up some of these great game(s) too so you all can play over Xbox LIVE together!