How do I retreat from an expedition with all my resources in Loop Hero?

Solution 1:

To retreat with all of your resources, you must retreat while on the camp tile (the one you start on, and heal at each loop). As @Wrigglenite's answer says, you have to click the retreat button in the bottom right.

You'll know you can retreat with everything if the retreat icon is glowing like so:

Compared to the normal button which looks like this:

Solution 2:

You can retreat from an expedition with all your resources by pressing the button in the lower right corner of the screen when you're standing on the camp tile.

If you hold the button down some gears will pop up, which indicates it'll give you the option automatically so you don't miss it (you still have the option of staying).