Category:No title text

It's rare for an xkcd comic to lack a title text. Among those, most are extra comics or are part of the A Smarter Planet series. Only three of the numbered comics have lacked title text, likely due to these comics being a new kind of interactive comic where title text isn't included as an option. The comic 404: Not Found doesn't have a title text because it's a 404 error page. There are also some comics that have more than one title text.