Rorschach's River

Here is an excerpt from Rorschach's River's description on the game's official website:

In July 2022, I asked Puzzlers Club whether there would be any interest in writing a big mashup puzzle in an exquisite corpse style. There was. This is that puzzle. Wait, why is it December 2025?

What is this?

It’s a path puzzle. You draw a path that enters the grid at the top and exits at the bottom. Along the way, there are 50 sections, each following a different ruleset. Consecutive sections overlap by a few rows, creating short hybrid sections in between.

I kicked off the puzzle with the first section at the top and then passed it on to the other authors. Each author could only see the section right before theirs (and the list of all rulesets so far, to avoid duplicates). I’m assuming you’re here to solve a puzzle though, so I will write more about the process in a separate post.

How do I solve it?

There’s a few options:

• I think the puzzle is really fun to solve on paper, so I’ve provided printable PDFs.
• If you prefer solving with Penpa+, that is an option, but I’ve had to split the puzzle into 10 parts for performance reasons.
• There are also image versions of the entire puzzle, in case you prefer solving it with image editing software.

All of these include self-contained versions that come with all the rules and example puzzles.