Doom · PC (MS-DOS) · 1993
A hidden room in Episode 1, Map 4 containing the digitised faces of the id Software development team mounted on the walls like trophies.
John Romero, John Carmack, Sandy Petersen, Dave Taylor, and Adrian Carmack had their faces digitised and texture-mapped onto wall panels in a secret chamber accessible only through a specific wall-pressing sequence. The room is typically found by players who are already exploring outside the main path, and the faces themselves — pixellated but recognisable — provided id's young fanbase with rare personal visibility into the team making the game. The developer room tradition continued in many subsequent id Software titles and influenced the broader practice of embedding team tributes in hidden areas, a tradition that persists in AAA games to this day.
In E1M4 (Command Control), find the room with the blue key and locate the secret door on the south wall. Press the wall to open it, then navigate through the hidden corridor. Follow the passage to a room lined with the digitised faces of the id Software team.