12 Video Games Created By Accident

12. DOOM

It's genuinely challenging to comprehend how influential Doom was, not just to the gaming community, but to the whole world. In 1995, Doom wasn't just the best-selling game, but the best-selling software. (It even outsold Windows 95.) Some people bought a PC solely to play this masterful FPS. Certain businesses reprogrammed their computers so Doom couldn't run, because employees kept playing it instead of working!

And yet, Doom could've been very, very different. Shortly after id Software was formed, co-founder, John Romero, convinced his team to work on a grisly monster-filled shooter called Green and Pissed. (It was a working title.)

As the project started taking shape, id Software realised it had many similarities to James Cameron's movie, Aliens. Believing they could turn the game into a movie tie-in, the developers tried to cut a deal with 20th Century Fox.

When these plans fell through, id Software rejigged everything, turning the project into a new IP called Doom. When you think about it, the busted deal worked out for everyone, since it gave id Software far more freedom with the game, allowing them to create the most influential first-person shooter of all time.