How do I open this secret room?

Question

Near the beginning of the game, there is a room full of mermen. The completed map shows a secret room connected at the bottom left of this area. I have heard stories about using the wolf/bat and this tunnel to unlock it. Sometimes they say you need to ram the ledge on the wall. How do I gain access to this room in both castles?

Here is a screenshot from the inverted castle:

Asked by OrigamiRobot

Answer

I started a new game to test this: you don't need wolf form at all, nor can it be done without bat form.

Assuming you've opened the tunnel in the middle of the room (as indicated by the image you linked to), you just need to turn into bat form and fly through the tunnel, hugging the top of the tunnel.

This video illustrates the general principle:

Answered by Mark Trapp

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How do I get 200.6% map completion?

Question

Basically I have 1889 rooms discovered and I am at 200.5% and I absolutely cannot see which room I need to discover in order to make that final 0.1%

I was wondering anybody had a map that would show me where I might be missing a room.

Also if any of you have a keen eye and are willing to have a look for me, you will have my eternal gratitude.

Regular Map

Inverted Map

Asked by Richie

Answer

Here are the completed maps. There are 1890 rooms in total. Unfortunately, the only way is to carefully comb over them to find the discrepancy.

Your missing room is here.

Answered by OrigamiRobot

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