This link is in Dutch, so I'll translate it for you fellas:
John Romero, one of the developers of the immense popular game "Doom", has created a first new level, 21 years after its first release. He offers his level, an alternative for the end of the game (of episode 1), for free via dropbox. (https://www.dropbox.com/s/2x2ee3r51986d ... b.zip?dl=0)
When Doom was released in 1993, it became an immediate success. In 1995, there were already 10 million players in love with this game! Doom still has a great audience/community up until this day that creates its own content!
The sourcecode of the game has been available for a while now, and every day there are Doom-fans that create their own new levels. Romero guesses that there are around thirty alternative versions of the game and more than 100.000 extra levels.
Romero created and named his own level: "Tech Gone Bad", as a warm-up for a new project (so he says to the BBC). It's a so-named boss level, an endmap in which the boss, an extra strong enemy, has to be defeated!
The level ends with a big complex with a giant computerchamber, but still situates outside. That is what Romero finds to be a difference from the original boss level, which isn't created by him but by Sandy Petersen.
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"Unbelievable that a 23 year old game still has that many enthusiastic players!" - John Romero (Developer of "Doom")
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The alternative end of Romero was welcomed with open arms by the fans. Romero hopes that his new level will bring just as much enjoyment as the original game did so many years ago.
When Doom was released, it was only playable on PC and was played with a keyboard and a mouse. Meanwhile, it has been released on consoles as well.
Spoiler: Youtube Video of the map (Open)