Judging by some of the comments I've gotten, a lot of you have figured out how to get to the true ending -- and as you guys know, it's pretty essential to the overall story. I want to be sure everyone playing the game gets the chance to see it, so here's a very brief spoiler-free guide:

After you reach the point where you select between three different endings, select one -- it doesn't matter which one -- and wait until you see the "Back to Menu" button. Click the button, then replay the game. You can use the skip button, (or hold down Control), to make it go a bit faster if you want.

Enjoy the true ending!

-- LockedOff.