Wow. Just wow. I went through this game once and didn't get the achievement even though I was using a checklist. This looks absolutely awesome. My only suggestion would've been to show the map when you're standing in front of each terminal to help people narrow down where they are. That being said, you shouldn't have any trouble once you're in the level. I'm going to use this this weekend to go back through the game and try to get that elusive achievement (and even out my gamerscore again!). Thanks for all of the effort that you've put into this.
: Tier One , Tier Two , Tier Three