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Cleanup this page!
This article could use a cleanup in order to be more legible and/or presentable. Please help improve this article in any way possible. Remember to follow our editing guidelines when improving existing articles. If you can improve this page, please edit it, or help by discussing possible changes on the talk page.
If you need help with wiki markup, see the wiki markup page. If you want to try out wiki markup without damaging a page, why not use the sandbox?
The following is a spoiler-free walkthrough, wherever possible. It was written using the Xbox 360 version of the game, and includes references to Xbox Live achievements, again without spoilers, at the current time. However, wherever possible it was intended to be platform-independent. The walkthrough is broken down into 7 sections, beginning with Memory Block One.