Developers who subscribed to Unreal's $19 (about £11, AU$20) per month plan that debuted at GDC this year and who are members of the ID@XBOX program or, conversely, registered PlayStation developers, will receive source code at no extra cost.
Also part of the update is support for SteamOS and Linux. This still requires a Windows machine or Mac to run the actual development kit and a Steam Controller to test the finished product, but the update makes completed games quicker and easier to port to the open-source platforms.
It's like Ice Cube once sang, "Today was a good day." For developers.
And for gamers, too
This doesn't sound like much to us non-coding folks, but this will actually radically improve the development world and should increase the speed at which games are made for these platforms.
Giving developers direct access to Unreal's PS4 and Xbox One source code will make modifying the important aspects of games (things like in-game physics, lighting and animation) unimaginably easier.
Interested in working on building your own game? The Unreal Engine's a powerful, cost-effective way to start ($19 a month is crazy for a development kit as feature-rich as the UDK). The catch? Be prepared to sacrifice 5% of your earnings to the guys at Epic to fund Gears of War 4.
I develop and so can you
It's long been known that retail Xbox One systems may double as development kits - a far cry from the Xbox 360 days where owning a testing environment was a complete hassle - but this announcement could be a precursor for the Big M to make a formal announcement and instructions on how to do it at this year's E3.
It's a bit of a stretch, but crazier things have happened.
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Nick Pino is Managing Editor, TV and AV for TechRadar's sister site, Tom's Guide. Previously, he was the Senior Editor of Home Entertainment at TechRadar, covering TVs, headphones, speakers, video games, VR and streaming devices. He's also written for GamesRadar+, Official Xbox Magazine, PC Gamer and other outlets over the last decade, and he has a degree in computer science he's not using if anyone wants it.