Hey! You're free to twist it however you'd like, but I always envisioned the Your Turn To Die challenges while writing about the attractions... Things like a room where you must shoot x number of targets and risk shooting your friends if you want it to let you out, or a dangerous but optional challenge room to acquire some currency/additional intel. If you haven't heard about it, I would recommend looking up some footage (or playing it, it's free) for inspiration.
That being said, anything that can endanger the survivors, as well as make them interact with one another is good. Something like a Danganronpa-like trial where one person has to be sacrificed or even just a classic saw trap (depending on the vibe you're aiming for) can work just as well, as long as it gets your friends to roleplay together/rack their brain to find the "perfect solution" to escape them unharmed (even if there isn't necessarily one)