Found at ctftime.org, Square's annual public CTF has a Unix MAN page aesthetic that is very cool, and persistent hosing for past year's events! Check out squarectf.com for a complete list of problems, the story behind the problems, and for write-ups of the problems that I didn't get to!
I seem to be getting at least marginally better at this, so hopefully the writeups below are useful to somebody.
- dot-n-dash: A fun little encoding problem
- shredded: Exactly what you'd expect
- captcha: My white whale