SPOILERS INSIDE

This game was originally conceived as a single (crime) mystery you were meant to solve. As time went on, while I was playing Chaos;Child and the mystery was unfolding, I noticed how the solution to the mystery was actually less exciting than the speculation I had in my mind. This happened several times before in mystery stories, so I wanted to address that. In Undead Air you can get a different mystery/horror "flavor" depending on your interpretation. So the story could actually become a ghost story, alien, sci-fi or crime story.

The way the endings are triggered is by selecting the right calls during your radio show (all the other choices only change dialogue but don't influence the ending). Here are the calls needed for all the endings:

-End A: ARTHUR / (any call between STEPHEN, CORRADO or PHILIP) / AGATHA
-End B: BRAM / STEPHEN / EDGAR
-End C: BRAM / CORRADO / EDGAR
-End D: BRAM / PHILIP / EDGAR

And here is a flowchart!

Remember to use TAB to skip already seen text on your subsequent playthroughs!