1. You can select the Undertow campaign from the Game type: selector in the game setup buttons.

Once you confirm your game setup options with the Confirm selection button you'll be take to the campaign setup menu.

2. The Undertow campaign setup defaults to use the Original tyrant layout which is the normal campaign Undertow campaign settings.

This will have you fighting against Barnacle first, followed by a tyrant of your choosing and then a final showdown against Nobulous in the Break.

The Tyrant configuration button can be changed to Custom tyrant layout which allows you to select tyrants of your choosing for each round.

3. Once you select Confirm selection then the game board is set up as normal.

4. There are two new buttons after the table has been set up.

https://steamcommunity.com/sharedfiles/filedetails/?id=2684127655

The first will show you the amount of progress points needed to challenge the next tyrant.

When you have successfully defeated the tyrant press the Press when the tyrant has been defeated[/] button to set up the next tyrant.