If you’ve been exploring Timesville in Endacopia, you’ve probably noticed there’s more going on than the main story lets on. One of the coolest hidden secrets involves a mysterious locked room that doesn’t behave like anything else in the game. Even after solving the nearby puzzles, the door refuses to open unless you figure out a very unusual clue.
Endacopia Timesville Secret Puzzle Guide – How to Get the Lost Key & Unlock the Secret Room
The secret is surprisingly easy once you know where to look, but the game does a great job of hiding it. This guide walks you through every step, from obtaining the Lost Key to opening the hidden room.
Step 1: Get the Fishing Paper
Before you can access the secret, you’ll first need the Fishing Paper.
To obtain it:
- Find and use the Metal Detector.
- Locate and collect the Fishing Paper.
- Read the paper to learn what needs to be done next.
At this point, the paper won’t give you the key immediately.
Catch Every Fish
The next requirement is completing the entire fishing collection.
There are 18 catches spread across six different time periods:
- Day 1
- Day 2
- Day 3
- Night 1
- Night 2
- Night 3
Each period contains three unique fish or collectibles, so you’ll need to revisit the fishing minigame multiple times until you’ve collected every single one.
If you’re missing even one catch, the puzzle won’t progress.
Inspect the Fishing Paper Again
After collecting all 18 fish, open your inventory and inspect the Fishing Paper once more.
This time, you’ll receive the Lost Key.
Without rechecking the paper, the key won’t appear, so don’t skip this step.
Find the Correct Room
With the Lost Key in hand, head back to the pair of nearly identical rooms in Timesville.
Choose the smaller of the two rooms.
Before continuing, make sure you’ve already completed the puzzle involving these two rooms. If everything has been done correctly, the smaller room should now appear slightly different than before.
Wait for the Hidden Message
Once inside the room, don’t do anything.
Simply stand still for a few moments.
Eventually, you’ll hear a voice speaking backwards.
At first it sounds like random audio, but it’s actually giving you the final clue.
When reversed, the message says:
“Have you tried entering this room in windowed mode?”
This is one of Endacopia’s more creative fourth-wall puzzles.
Switch to Windowed Mode
Now leave the room and switch the game from fullscreen to Windowed Mode.
The quickest shortcut is:
Alt + Enter
Once the game is running in windowed mode, return to the same room.
Instead of seeing the mysterious black window, you’ll now find a large lock waiting for you.
Use the Lost Key
Walk up to the lock and interact with it using the Lost Key.
Once the key is inserted, the secret puzzle is completed and you’ll successfully unlock the hidden Timesville room.
Timesville Secret Puzzle Summary
If you just want a quick checklist, here’s the entire process:
- Use the Metal Detector to obtain the Fishing Paper.
- Catch all 18 fish across every day and night cycle.
- Inspect the Fishing Paper again to receive the Lost Key.
- Complete the puzzle involving the two similar rooms.
- Enter the smaller room and wait for the reversed voice message.
- Switch the game to Windowed Mode using Alt + Enter.
- Re-enter the room.
- Use the Lost Key on the newly appeared lock.
This is one of the most memorable secrets in Endacopia because it asks you to think outside the game itself. Instead of solving another traditional puzzle, you’re rewarded for paying attention to an audio clue and changing how the game is displayed, making it a clever hidden Easter egg that many players completely overlook on their first playthrough.