John Romero, John Carmack, Tom Hall, and Adrian Carmack officially found id Software. This marks a turning point in Romero's career and the history of video games.

id Software releases "Wolfenstein 3D", a groundbreaking first-person shooter that popularizes the genre. Romero's contributions include level design and gameplay programming. This game sets a new standard for action games on the PC.

id Software releases "DOOM", a revolutionary first-person shooter that further defines the genre. Romero serves as a level designer and contributor to the game's overall design. DOOM becomes a massive cultural phenomenon.

Romero is involved in the early stages of "Quake" development, but creative differences begin to emerge between him and John Carmack. These tensions lead to his eventual departure from id Software.

John Romero leaves id Software due to creative differences and internal tensions, marking the end of a highly influential chapter in his career. His departure is a significant event in gaming history.