The Xbox Live Nation Achievements overview page shows you what achievements you can earn at Xbox Live Nation. The achievements are asigned to members automatically based on the follwing principles:
* Activities a gamer has displayed on Xbox Live and Live Anywhere.
* Activities here on the Xbox Live Nation website.
On the achievements page (http://www.xboxlivenation.com/community/gamerbadge.php) you can directly access your own achievements if you are a member. To view the achievements of a gamer/member just use one of the available links in the forum posts or in the Live DNA of a gamer.