The official leaderboards have Any% leaderboards for the all zones mode of each character, story mode, and all characters mode.

The official Steam leaderboard is viewable in-game and is mirrored on the web at http://crypt.toofz.com/leaderboards .

There is also an official leaderboard for the GOG.com release. As far as I am aware, it is only viewable in-game by those who have purchased that version and is not viewable on the web.