Microsoft has announced discounts of the week on Game Store valid until 17 of the current month: between the games on offer include the hilarious Retro City Rampage at a discount of 50%, V Soulcalibur proposed to the 75% discount and many others. Here's the complete list.

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Content Title	Content Type	Discount%
Eternal Sonata	Games on Demand	37% – 50%
Earth Defense Force: Insect Armageddon	Games on Demand	50%
Soulcalibur V	Games on Demand	75%
Sanctum 2	Arcade	67%
Retro City Rampage	Arcade	50%
Doodle Jump	Arcade	80%
Giana Sisters	Arcade	67%
Capsized	Arcade	50%
Hexodius	Arcade	50%
Foul Play	Arcade	67%
Runner2: Future Legend of Rhythm Alien	Arcade	67%