If you've been waiting for id Software to open source its retroactively titled id Tech 4 technology, first used in 2004's Doom 3, your seven-year test of patience is nearly over. John Carmack used yesterday's Halloween opportunity to burst out of a monster closet (on Twitter) declaring, "doom 3 source is packaged and tested, we are waiting on final lawyer clearance for release."

And while seven years seems like just enough time to ensure the absence of commercial viability for the tech, remember Prey 2 will be using a modified version, which producer Matt Bisenius called "capable." We're also going to take this opportunity to prematurely mark 2018 down in our calendars, for the Rage / id Tech 5 source code release.

This article was originally published on Joystiq.

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