For a brief moment in time, an updated version of the Xbox 360's backwards compatibility list was exposed for all the internet to see. Though it was yanked in a matter of minutes, one new entry stood out like an atomic mushroom cloud in a serene, children's playground. Not to imply that Psychonauts is capable of melting children or flooding large masses of land with deadly radiation, but its presence was rather devastating to the psyche.

In case you weren't aware (and clearly you aren't much of the time), Tim Schafer and his team at Double Fine did extraordinary things with Psychonauts, managing to take the seemingly incompatible platformer and adventure genres and mash them together like two pieces of clay. That's before they twisted the whole mess into a variety of amusing shapes.

Oh, there's a whole bunch of other new games too. However, when asked about the exact release date of this December update, Microsoft warned us that the list is not final. "We'll have more news soon -- as I'm sure you're aware with any software development, things can change at any time so we want to make an announcement when we're sure we've got the final, solid list."

View the non-final, slightly wobbly list of additions after the break.

[Thanks Nick! Thanks to Richard from Xbox 360 Fanboy for remembering to take a screenshot.]