In the rule “Isles of BoardGamia”, add the following text:

A Token whose Position is less than the value of a square is said to be behind that square. A Token whose Position is greater than the value of a square is said to be in front of that square.

In the rule “The Turn”, after the text “[4 for Big Tokens, 3 for Medium Tokens, 2 for Small Tokens]” and before the text “Roll Sicherman Dice of your own Dice Type”, insert the text “As an action called Walking,”.

In the rule “Forbidden Island Local Rules”, replace the rule text with the following:

Each Token has a publicly-tracked Status, defaulting to None.

For each Token in the Forbidden Island, the Density for that Token is a calculated value that equals the number of contiguous Green squares immediately in front of that Token’s Position, and the Barrier for that Token is the first Green square in Forbidden Island that is in front of that Token.

Whenever a Token’s Position is changed, if that Token’s new Position would move it on or in front of that Token’s Barrier, the following rules apply:
* If that Token’s Status is Lost, and Walking was performed for that Token this Turn, if the result of that Walking was at least equal to that Token’s Density, that Token’s Status is set to None. Otherwise, that Token’s Position remains the same as it was just before that Walking was performed.
* If that Token’s Status has not been Lost this Turn, that Token’s Position is instead set to the square immediately preceding that Token’s Barrier and that Token’s Status is set to Lost.