For those who can’t remember the 1990s, Doom was invented by Dave Taylor, John Carmack, and John Romero of id Software, heading a team of five.

In late 1992, it had become clear that the 3D engine John Carmack was planning for Doom would speed up real-time rendering while allowing texture maps to add detail to environments. As a result, Romero's ambition was to set Doom in architecturally complex worlds with multiple storeys, curved walls, and moving platforms.

In August 1993, there was no gaming at all. It was just a 3D engine. But you could move around it fluidly, and you got such a sense of immersion that it was shocking.

Taylor said that the renderer was kick ass, and the textures were so gritty and cool that he thought he was looking at an in-game cinematic.

“Romero is just the consummate demo man: he feeds off your energy. So, as my jaw hit the floor, he became more animated. Doom was amazing, but John was at least half of that demo's impact on me," Taylor remembered.

In late 1992, it had become clear that the 3D engine John Carmack was planning for Doom would speed up real-time rendering while allowing texture maps to add detail to environments. As a result, Romero's ambition was to set Doom in architecturally complex worlds with multiple storeys, curved walls, and moving platforms.

When Doom was launched on 10 December 1993, it became clear that the game was all-consuming — id Software had chosen to make the abbreviated shareware version available via the FTP site of the University of Wisconsin-Madison, but that crashed almost immediately.

"We changed the rules of design," says Romero. "Getting rid of lives, which was an arcade holdover that every game had; getting rid of the score because it was not the game’s goal. We wanted to make it so that, if the player died, they'd start that level over — we were constantly pushing them forward. The game's attitude was, I want you to keep playing. We wanted to get people to the point where they always needed more."

And today on X, John Romero said that DOOM is remembered because of the community that plays and mods it 30 years on.

“I'm grateful to be a part of that community and fortunate to have been there at its beginning."