Root Letter

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.

Sony's PlayStation Vita (2011) was a technically impressive handheld that never found the commercial audience it deserved, leading to a comparatively small but well-regarded library. Because Sony discontinued cartridge production relatively early and shut down the PSN storefront for new purchases, physical Vita games — some produced in very limited numbers by niche publishers — have become a genuinely scarce, actively appreciating collecting niche.

Gamevaro tracks Root Letter for PlayStation Vita 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 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 PS VITA release dates back to 2016.

Only a handful of market sales have been tracked for Root Letter, suggesting it doesn't trade hands very often — a sign of relative scarcity compared to more common PlayStation Vita 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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