The "True Warrior" text I mention above is found on Level 6 in the map area called "Refrigeration West". It's on the wall just before you enter the zero-grav area. (The room has a stasis recharge unit in it.)

The text actually reads "Warrior Truth". I was only able to read this on a 1080p 100" display... so you may have a tough time reading it.

Interesting that "Warrior Truth" has twelve characters in it...

Whoops. Up there I meant to write:
...so that I WOULDN'T see spoilers

Sorry about that.

Dear Matthew Pellett (and anyone else who cares):

I played this game through multiple times in a vacuum... meaning that I steered entirely clear of the internet so that I would see spoilers. Like yourself, I discovered the script and set about excitedly deciphering it. (In my case, I found the "rosetta stone" on Level 6 and went from there... eventually finding my first "green light" message on Level 10.)

Here's my issue: after checking and double-checking and triple-checking (on the 360 version), the green arrow on Level 12 is indeed pointing to the right. This indicates that the correct button press should be X. Yet every appearance of this "twelve level spanning mystery code" that I have found on web sites (and in your article) lists the last press as Y (or Triangle on the PS3). Any idea why? Did I miss the "true" level 12 message somewhere?

I found my level 12 message on the wall in the left-hand side of the "lock down room" that you enter just after the big fight around the bridges.

Also: did you find the green "True Warrior" text on Level 6? It's the only other text (beside the 12 secret arrows) I have found in the game that appears green under weapons lighting.

In any event, nice work on the article. You weren't the only one out there sucked into the unitology script easter egg hunt!