I've tried and can't figure out how to romance Guildenstern nor unlock the "Responsibility for Indulgence" ending (the only ending in the book I don't have). I found a helpful set of hints on Steam, but their walkthrough for the ending always leads me to "Everyone for Myself." Can anyone help me out?

If you haven't unlocked the Guildenstern is Dead mission, here are some notes that helped me: "Get on the boat, don't get distracted by the captain or you'll miss Guildenstern's event. You don't need to cooperate with the captain to survive: if Guildenstern has enough information, she can deal with the captain herself." Also something about doing "Irma's Ire" at the same time, but I can't swear that helped.