The fourth and final week of the XBLA House Party is upon us. Evidently, the party was so rockin' that it caused a series of global catastrophes.
https://www.trueachievements.com/I-AM-Alive-xbox-360.htm - 1200 MSP One year after a worldwide cataclysmic event has wiped out most of human civilization, a man struggles for survival. Faced with an insecure, decaying, and hazardous world, he scours a desolated city, searching for his long lost wife and daughter. Survive the suffocating, murky streets covered in dust. Climb the teetering remains of the last standing skyscrapers to reach breathable air and find untouched resources. Explore the crumbling ruins of a once-thriving metropolis. And discover a changed human condition, punctuated by distrustful survivors, dangerous armed gangs, and victims in need.
http://marketplace.xbox.com/Product/I-Am-Alive/66acd000-77fe...
Reminder: Purchasing all four House Party titles before March 13th will net you a refund of 800 MSP.
We've got the full list of I Am Alive achievements - check the list for guides to unlocking them.