The BBC gameshow sees contestants battle it out for £120,000 while completing challenges and filtering out the traitors in a Scottish castle.
Ms Duke, from Co Wicklow, was the only Irish contestant this year, exited the show yesterday.
She joined Oliver Callan on air this morning in her first interview since her banishment from the show.
“It was recorded ages ago, so watching it back, even when I was about to get eliminated, I was like ‘oh my god I hope they don’t pick me’.
“Obviously, it’s devastating to leave, because the game is actually so fun,” she told the RTÉ presenter on Radio 1 this morning.
In the gameshow, three contestant out of the 22 must, each night, hide their identity while the rest of the group, known as the faithful, determine who they are, before they are murdered one by one.
Ms Duke, a 28-year-old children’s swimming instructor from Kilbride, said that while it looks quite stressful on screen, the game is “just so much craic”.
“I think because I work with kids, I love playing games. I kind of play games for a living,” she said.
With dreams of entering the sustainable fashion industry, Ms Duke said that before entering, she wasn’t sure if she would be capable of picking out a liar.
“I thought maybe because I am around kids all the time and they are telling a few fibs, I might be able to catch a liar, but I mostly wanted to play the game.
“It’s a really good show. You never get to spend a full month as an adult totally engrossed in a game,” she said, speaking of it appeal.
Ms Duke said it was “really intense” as there were people constantly turning to each other, insinuating that the opposing person is one of the ‘traitors’.
“For me, your heart is in your throat, your hands are sweaty. The paranoia is next level.
“I would never have described myself as an anxious person before but I felt massively anxious at points in the show.
“You always feel like you are going to be the one to go, you feel like you are going to be murdered or that everyone is talking about you,” she said.
Ms Duke stressed that the environment invokes those feelings in everyone.
She said the days felt like a lifetime as the show is so immersive, and when the group is eager to identify a traitor, they get “a little bit neurotic”.
“Everyone is then throwing every name out on the table. That is bad news then for the traitors because it is more likely for their name to come up.”
She said she was an “easy candidate” as she was in the top eight, and knew they would “throw her under the bus”.
On advice for those in the Irish version of the show, due to be filmed this year and hosted by actress Siobhán McSweeney, Ms Duke said: “Just be yourself.”
