In the series, Doom is consistently about hidden mysteries that players can discover. Right from secret passages opened by buttons in Doom 1 and Doom 2, to locating passwords for lockers in Doom 3, exploration has always been a satisfying adventure. The latest installment, Doom: The Dark Ages, maintains this pattern with an array of collectibles scattered throughout its 22 chapters.
Frequently, these collectibles are concealed as puzzles for players to uncover, and while certain mysteries are simple to solve, others require a good deal of investigation to locate. In specific instances, you might need to hunt down a secret passcode to unlock some of them. If you’re struggling to find the secret passcode in Chapter 17, here’s where it can be found instead.
Where to Find the Secret Key in Chapter 17
Chapter 17 may not be extensive in length, but it offers numerous areas for concealment. Be cautious not to overly scrutinize your search for the secret key since it’s situated toward the end of the level. You’ll be near the key when you hear the Witch utter, “Get ready for the sacrifice.” When facing the temple, look to its left to spot remnants of an old shipwreck. Approach this wreckage, gather the gold, and proceed towards the door on the shipwreck’s site.

In a short while, around a couple of seconds, the door will swing open, granting you access to the key. Keep in mind, as you grab the key, a small pack of demons might materialize, so stay on your guard.
Where to Use the Secret Key in Chapter 17

In certain stages of “Doom: The Dark Ages,” a hidden key grants access to several doors that would otherwise remain closed. However, only one door can be unlocked with this secret key in Chapter 17. Fortunately, it’s not too far from where you obtain the key, so there’s minimal need for retracking, if any.

In the very spot where I stumbled upon the mysterious key, there lies a Sentinel Shrine hidden from sight before reaching the temple. Before venturing closer, take note of this shrine with its enigmatic gate. If you have the secret key in your possession, simply walking towards it will magically unlock the gate and grant entrance to the chamber within. Inside, I stumbled upon a radiant Ruby, waiting to be claimed without any additional puzzles to solve – unlike those tricky wolf statues from earlier chapters. Remember, this is the sole secret that requires the use of the secret key. Once you’ve exhausted all other discoveries in the area, feel free to move onward to the next captivating chapter of my adventure.
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2025-05-17 07:05