Zero Escape: The Nonary Games (UP)
38 Achievements
35-40h
Who Set Up Us The Bomb, Part A
Opened the ninth lock in VLR. Details for this achievement will be revealed once unlocked
35.3%
How to unlock the Who Set Up Us The Bomb, Part A achievement in Zero Escape: The Nonary Games - Definitive Guide
Which is found on path Cyan>Ally>Blue>Betray and blocked by Locks 5 and 6.
To open the nineth lock you must take the path Cyan>Betray>Red (Saying Yes to the proposed plan)>Ally. The path is also blocked by Lock 8:
And that can be unlocked on the path by choosing Betray after the Red door.
If you are skipping through the dialog I recommend spamming as this seems to go through dialog faster than spamming . Otherwise, enjoy the story.
To actually unlock the lock, first you need to follow the path used to reach the eighth lock
Story locks are plot checkpoints that will not let you pass if you have not gained pertinent information from other routes. Trophy-wise, it does not matter if you actually are stopped by these locks when you're playing the game (as opposed to already having the information before hitting the lock in the first place).
The ninth lock is located via the following choices: Cyan / Betray / Yes / Red (you don't have a choice) / Ally / pass story lock 8 (see Why'd You Do That, You Dumas!).
To bypass this lock, you must play the following route: Magenta / Betray / Red (you don't have a choice) / Betray – i.e. clear Dio's ending AND Yellow / Ally / Red / cleared the laboratory escape.
Note that this story lock requires codes found in the Alice, Sigma, Tenmyouji and Dio endings.