This walkthrough covers the English Steam remaster included in Zero Escape: The Nonary Games. Complete each escape room as you encounter it, then follow the numbered door selections for the desired ending. You can use the flowchart to return to an earlier decision instead of repeating the full story.
The recommended completion order is Axe, Knife, Submarine, optional Coffin, Safe, and True. The Safe Ending must be recorded before you can finish the True Ending.
Ending #1 – Axe Ending
Save 1 – First numbered door decision
Door 5 — First Class Cabin
Door 7 — Operating Room
Door 1 — Chart Room
Continue reading to the Axe Ending.
Ending #2 – Knife Ending
Load Save 1
Door 4 — Second Class Cabin
Door 8 — Laboratory
Door 6 — Steam Engine Room
Complete the rooms and continue to the Knife Ending.
Ending #3 – Submarine Ending
Load Save 1
Door 5 — First Class Cabin
Door 8 — Laboratory
Door 2 — Confinement Area
Continue to the Submarine Ending.
Ending #4 – Coffin Ending
Important: Complete this before recording the Safe Ending if you want to view its separate cliffhanger.
Load Save 1
Door 4 — Second Class Cabin
Accept Santa’s four-leaf clover bookmark.
In the Kitchen, choose It did seem rather odd. when June discusses carbon dioxide.
Door 7 — Operating Room
Ask Seven about Ice-9.
Give Clover the bookmark.
Door 1 — Chart Room
Continue to the Coffin Ending.
This is the same prerequisite path used for the True Ending, but without Safe Ending completion recorded.
Ending #5 – Safe Ending (Zero Lost)
Load Save 1
Door 5 — First Class Cabin
Examine the safe inside the closet before you leave the cabin.
Door 8 — Laboratory
Door 6 — Steam Engine Room
Complete the route and reach the Safe Ending.
Save the ending to the same file so the Safe Ending icon is recorded.
Ending #6 – True Ending
Load Save 1 (after recording the Safe Ending)
Door 4 — Second Class Cabin
Accept Santa’s four-leaf clover bookmark.
In the Kitchen, choose It did seem rather odd. in the conversation about carbon dioxide.
Door 7 — Operating Room
Ask Seven about Ice-9.
Give Clover the four-leaf clover bookmark.
Door 1 — Chart Room
Finish the subsequent rooms and final puzzle.
Continue through the conclusion to receive the True Ending.
If this leads to the Axe Ending, return to the Door 4 / Door 7 route and make sure all four conversations and item steps were completed.
