The survival adventure title follows every-man Adam Collins in search of his wife and daughter after an unspecified cataclysmic 'Event'.
The final title in the Xbox Live House Party promotion, I Am Alive can be downloaded for 1200 Microsoft Points (£10.20 / $15).
You can also download DLC for Mass Effect 3 and Forza Motorsport 4, as well as discounted content for Borderlands.
> Read last week's Xbox Live Arcade
Read this week's Xbox Live update in full:
- I Am Alive (1200MS / £10.80 / $15)
Games on Demand
- Carnival Games
- Command & Conquer: Red Alert 3
- Tiger Woods PGA Tour 12
- Mass Effect 3: From Ashes (800 MS / £6.80 / $10)
- Forza Motorsport 4: March Pirelli Car Pack (560 MS / £4.80 / $7)
Deal of the week
- Borderlands: Secret Armory (400 MS / £3.40 / $ 5)
- Borderlands: Zombie Island (400 MS / £3.40 / $ 5)
- Borderlands: New Revolution (400 MS / £3.40 / $ 5)
- Borderlands: The Underdome (400 MS / £3.40 / $ 5)
- Borderlands: Claptrap (220 MS / £1.85 / $2.75)
- Borderlands: Treasure Chest (160 MS / £1.35 / $2)
Watch a trailer for I Am Alive below: