How many people are playing Narcissu 1st & 2nd right now?

Narcissu 1st & 2nd has 18 players on Steam right now, with a 24-hour peak of 33 and an all-time peak of 399 on May 2019.

What is the all-time peak player count of Narcissu 1st & 2nd?

399 concurrent players on May 2019.

Narcissu 1st & 2nd was released on Steam on 24 Apr 2015.

From the store page

5 achievements

Finished Narcissu 1st (voiced)

Finished Narcissu 2nd (voiced)

Finished Narcissu 1st (unvoiced)

Finished Narcissu 2nd (unvoiced)

Finished Narcissu 2nd Epilogue

Only the achievements the store page highlights. The rest follow once this game has been read from the achievement schema.