I realize I've published the cheats, but I'll say this anyway: using cheats can ruin your gaming experience. Cheat with caution.
This guide is not 100% complete, and probably never will be. No matter how many times I go through this guide, I'll always miss something. If you find any errors please let me know (see How to Contact Me, below).
Also, most of the stuff mentioned in this guide is copyright Bioware, Demiurge, Electronic Arts, or somebody else.
Even though this guide provides all the solutions to puzzles and such, you still need to perform all the actions for the solution to work. The game won't give you something unless it recognizes that you've performed the prerequisites for it.
I occasionally get confused when talking about directions. Up, down, left, and right are usually towards that side of the screen. North, South, East, and West are usually map directions, but can correspond to screen directions as well.
Most places you go don't have in-game maps, and the few places that do have really good maps. Therefore I'm not going to publish any of my own. Hold the M key to pull up a pulsing objective arrow, and that should be enough to get you where you're going. The maps don't branch so much that you'll get lost. As far as finding stuff, just look around very carefully, and reference the Items pages.
I use several abbreviations in this guide. Here are some:
This walkthrough can be distributed however you like as long as you don't claim credit for it.
Alpha: 4 October 2012
Version 1.0: 14 January 2013
Version 1.01: 29 June 2013. Fixed some typos and grammatical errors, and probably created some new ones. Shortened the checklist. Removed a lot of the useless Paragon VERSUS Renegade dialog options.
Version 1.02: 24 November 2014. Typos. Lots of Typos.
Version 1.03: 22 January 2015. Added a Consequences page about decisions that carry over into ME3.
Version 1.04: 4 February 2016. Added a bunch of tweaks to the hints page. Fixed a few typos elsewehre.