Never Completed Game

Question

The seventeenth of the primes.
Its twin is twentynine.
Po.
Let’s drive.
Bye, Alfonsín.
Add seven triangular.
Sweet.
It named the Valley.

This riddle is taken from https://www.nevercompletedgame.com/ It is the final question of the challenge (number 41), and it has not been solved yet. My guess so far is that each line refers to a two-digit number, and that the numbers form some kind of a cipher, since my guesses contain some repeated numbers. My guesses for the numbers on each line:

1. 59 (the seventeenth prime number)
2. 31 (29's twin prime)
3. 84 (atomic number of Polonium)
4. 16 (first word in the song "Let's Drive" by John Oates)
5. 89 (year that Raúl Alfonsín left office)
6. 84 (sum of the first seven triangular numbers)
7. 16 (sweet sixteen)
8. 14 (atomic number of Silicon)

I have tried using a number to letter online decoder and a base 26 decoder, but I wasn't able to get anything meaningful with these numbers. I'm not 100% positive on any of them really, I might be completely off with my entire approach. The answers and explanations for the first 40 on this website are given here, for those that want to skip to 41 and test their solutions for this riddle:

https://pastebin.com/dSZV9eUq

Answer 1

after too much time on this, that is what I found:

This post said the numbers might be 59 31 14 3 89 84 16 14 that the coordinates

for 59 31 14 3 = Novgorodsky District, Novgorod Oblast, Russia 89 84 16 14 = Arctic Ocean

these places are 2,745 miles or 4,417 km apart As you can see on the wikipedia page of Novgorodsky District is have a connection to the Arctic Ocean

But maybe I am just overthinking...

Answer 2

An answer, that might be correct in form, but there are dubious parts:

Take the clues in pairs.

We are looking for a mid-point between the clue answers.

59 and 31 relate to pi.

Indeed 31 41 59 are the first 6 digits. 41 is between them. Matching the puzzle title is confirmation of approach!

84 16 rearranged are 4 8 16. Between them is 12. 4 8 12 16.

This is the dodgy part...

So far I have followed the clues for 1. & 2., and 3. & 4. I accept 89 for 5. but 6. I am reinterpreting.
Add seven triangular seems to suggest adding Tri(7)=28, but to what? I take a second route and see that it converges...
89 is the 24th prime. (We've already had a prime so I note this). 7 on from 24th is 31st. The 31st prime is 127. The Tri(127)=8128.
Wait, 28 is added to 81 to make 8128, this was Tri(7). What is between 89 and 81 (28)? Well $9=3^2$ and $81=3^4$ so $3^3=27$ ? And what is in between the 8 in 89 and the 28 in 8128 ? Well 18 would make sense.

But now I note we have digits 27 18 28, the first 6 digits of e.
I justify this based on the previous patterns, namely:
1. & 2. digits of $\pi$
3. I reversed 84 to get 48

But actually I have 10 digits of e because:
e is 2.7 18 28 18 28 45 90 45...

I am not sure I have a rigourous way of proceeding. And I am not sure I have not overthought this. But maybe the midpoint is just 31st and triangular is the confirmation.

7. & 8. The midpoint between 14 and 16 is 15.
So I have 41 12 31 15
41 is 13th prime and 31 is 11th prime

13 12 11 15 .. so maybe the answer is 14 as it goes before 15 and before 13 12 11. These are backwards so I have to flip.

So the final answer is 41, which takes me back to puzzle 41, and the game is never completed.

Edit: And finally:

As 42 is the answer to life, the universe and everything, we never quite get all the answers.

Answer 3

I might be wrong but I think the answer is:

either the valley of tribulation or the valley of seven triangles. I mostly believe in the latter. Too bad you can't find out if it's right. The guy who made the game is from Sweden and I haven't been able to contact him