Update: 3/13/2012: The sale has been extended, but there’s no word on the end date, so grab this now at only $29.99!

The video game deal of the day over at Amazon today is Gears Of War 3 for Xbox 360 for only $29.99 (that’s 50% off the list price of $59.99).

Note, this deal is valid only for today, Monday, March 12, 2012 until 11:59pm PST while supplies last.

Reminder: The Xbox LIVE 12 Month Gold Membership is still on sale for only $35.96 (that’s 40% off the usually price of $59.99).

From the product page:

• Enthralling cinematic story. Experience the epic finale to the Gears of War trilogy
• Unparalleled gameplay
• One of the definitive multiplayer experiences on Xbox LIVE
• Gears of War 3 pushes the envelope for stunning visuals on Xbox 360

Gears of War 3 is the spectacular conclusion to one of the most memorable and celebrated sagas in videogames. Developed by Epic Games exclusively for Xbox 360, Gears of War 3 plunges players into a harrowing tale of hope, survival and brotherhood.

In Gears of War 3, players fight on as Marcus Fenix, the grizzled war hero and leader of Delta Squad. Eighteen months after the fall of the last human city, the war against the Locust rages on. Meanwhile, deep beneath the surface, a fearsome new threat is infecting the planet from within. With survivors scattered and civilization in ruins, time is running out for Marcus and his comrades as they fight to save the human race.