Root Letter [Pen Pal Edition]

Root Letter (stylized √Letter) is a visual novel adventure video game that is developed and published by Kadokawa Games as the first title in their Kadokawa Game Mystery brand.

In the game, the player must figure out what happened to the character of Aya, a girl who mysteriously vanished after receiving a particular letter.

The PlayStation 4 (2013) cemented Sony's dominance of the eighth console generation, with a library exceeding 30,000 titles once indie and digital-only releases are counted. Most PS4 games remain affordable for collectors, but limited physical print runs — particularly from smaller publishers and later in the console's life cycle — are starting to see steady price increases as digital storefronts eventually wind down support.

Gamevaro tracks Root Letter [Pen Pal Edition] for PlayStation 4 with separate market values for loose, complete-in-box (CIB) and factory-sealed copies, sourced from real eBay sales. Prices also vary by region — PAL, NTSC-U and NTSC-J releases of the same game often sell for different amounts due to print run sizes and regional collector demand.

Adding Root Letter [Pen Pal Edition] to a Gamevaro collection takes seconds — search by title or scan the box barcode, and the app fills in cover art, release details and current pricing automatically. This PS4 release dates back to 2016.

Only a handful of market sales have been tracked for Root Letter [Pen Pal Edition], suggesting it doesn't trade hands very often — a sign of relative scarcity compared to more common PlayStation 4 titles.

Complete-in-box (CIB) copies typically command a premium over loose cartridges/discs because the original box and manual are more fragile and get discarded or damaged over time — fewer complete sets survive.

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