Just did a quick google search and found these:
Impossible Mission for the 7800 had a game breaking bug
Faxanadu had a game breaking bug
Quest for Glory 3 and 4 both did
King's Quest 4 did
Leisure Suit Larry 2 did
Jet Set Willy had the attic bug
Paper Mario on the SNES
Action 52 had so many
Bugs have been around since text adventures but today we live in an age where they can be fixed. As someone who lived through game breaking bugs just being a fact of life I am perfectly happy to wait a few months while they sort out all the issues and then pick it up. If you want a game day one then you have to accept that there will be bugs in it but at least the chance for a fix is coming.