Why'd You Do That, You Dumas! Trophy in Zero Escape: The Nonary Games

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 eighth lock is located via the following choices: Cyan / Betray / Yes / Red (you don't have a choice) / Ally.

To bypass this lock, you must play the following route: Cyan / Betray / Yes / Red (you don't have a choice) / Betray.