Secret areas
Not every path in Underkeep opens with a key. Sometimes there's a second way in next to the main entrance; sometimes the switch for a gate is hidden behind something on the wall. Before you go hunting for a missing key on the other side of the dungeon, take a good look around where you're standing.
Where to look for hidden passages
If you've reached an apparent dead end, try these general hints from a community guide. They aren't tied to one particular location.
Point me in the right direction
Check the edges of the area and the objects around the apparent dead end.
Give me another hint
The community guide points to passages among trees or rocks, and hidden switches underground.
Show the full solution
According to the community guide, some routes let you walk through trees or rocks. Underground, destructible objects or banners may conceal buttons. Break destructible objects and check banners when looking for a hidden switch. This is a general search tip without a specific location.
A side entrance to the mausoleum
In Underkeep Cemetery, four riddle altars stand around the main entrance to the mausoleum. A second way in starts right next to them and leads to a corridor that seems to dead-end.
Point me in the right direction
Before you start placing items on the altars, try walking around them.
Give me another hint
Take a closer look at the altar to the right of the main entrance.
Show the full solution
Walk across the tile by the right-hand altar and follow the hidden path into the underground corridor. At its dead end, use the torch that's already there – it works as a switch and opens the way on. You don't need a torch from your inventory.
The room past the spider corridor
Inside the mausoleum, a corridor full of webs leads to a closed gate. The switch is close by; it just doesn't look like an ordinary lever next to a door.
Point me in the right direction
Check the wall around the closed gate.
Give me another hint
The banner on the right-hand wall is hiding something.
Show the full solution
Face the gate and use the banner on the right. It reveals a small button. Press it and the room with the scroll opens.
The tunnel that turns you around
Beyond the five-plate puzzle in the dragon's lair, a tunnel turns your party around as you try to advance. These hints draw on Fahad Suleman's community walkthrough on Into Indie Games.
Point me in the right direction
Walk back a little. Korr has something to say about the obstacle.
Give me another hint
Korr suggests a switch could remove the illusion. Check the walls of the tunnel where you keep turning around.
Show the full solution
As you head deeper into the tunnel, look for a small rock-shaped switch in the right-hand wall. Press it to remove the illusion and pass through.
Note which way you were facing
When you mark a spot on the automap, add which way you were facing. "On the right" on its own won't mean much a week later.
A secret path can also lead back to places you already know. Once it's open, check where it comes out – it might be a shortcut.
Map or hints?
A community map shows exactly what's in the secret rooms and gives away later encounters too. Use it if you want to know everything up front. If you just want to confirm you're in the right place, the descriptions and first hints here give away less.