999: Nine Hours, Nine Persons, Nine Doors/Walkthrough
In 999: Nine Hours, Nine Persons, Nine Doors, you will have to play the game at least twice in order to get the “True Ending,” and at least five times if you want to see every ending.
There are many paths you can take to get the game, so a purely linear walkthrough is impossible. Instead, the rooms are listed numerically (1 through 9) in the Table of Contents, so just select whichever room you are currently in to get help in it, as opposed to going through them in the order listed. The ending section, in the appendix, can help you decide what room to go to next if you are attempting to get a certain ending.