Quake was an incredible leap forward in desktop games.

But Sandy Peterson is probably right, saying that it ‘Ruined’ the company - as an artistic creative force anyway.

The breakup of the brilliant and well-balanced ID Software team was caused by the trauma of developing Quake.

Romero and others were forced out or quit. This cut the heart out of the team, despite all of Carmack’s drive and technical brilliance

That is why the next leap ahead in games was not Quake 2 (1997), but Half Life (1998) which was, tellingly, based on the older tech Quake 1 engine