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…

68 16 June 2016

Adventure Role-playing (RPG) Strategy Visual Novel Mystery

Root Letter is an adventure developed by Kadokawa Games, released 16 June 2016 on PlayStation 4, PlayStation Vita and PC (Microsoft Windows).

Verified 23 Aug 2026 Sources: IGDB , Steam

What Root Letter is

Root Letter is an adventure game developed by Kadokawa Games and released in 2016. It is available on PlayStation 4, PlayStation Vita and PC (Microsoft Windows). It runs on Unity.

The premise, in the publisher's words

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 gameplay will be split into two distinct parts; the adventure part, where the player interrogates characters who knew Aya in order to find more information about her, and the simulation parts, where the player relives and plays through prior interactions with Aya.

Description from the publisher · source

How it plays

It is played from a text perspective. Its themes are mystery. It is a single-player game with no multiplayer component. There are 26 achievements to unlock.

How it was received

Root Letter holds a critic score of 68 out of 100. That places it above 30% of the 7,525 rated adventure games in our database, which average 72. Games released in 2016 averaged 68, so it scored about average for its year.

What you need to run it

The minimum specification calls for Intel Celeron G540, 2 GB RAM and Intel HD Graphics. At 2GB of RAM, it will run on essentially any working PC — that is below what a budget laptop ships with today. Install size is roughly 4GB. Both tiers are compared side by side on the requirements page, and you can check your own parts against them without installing anything.

Full requirements and PC checker →

What it launched against

Root Letter launched on 16 June 2016, within three weeks of Mirror's Edge Catalyst, Inside, The Witcher 3: Wild Hunt - Blood and Wine and The Witcher 3: Wild Hunt – Blood and Wine. All of them reviewed better. It arrived 3 years into the PlayStation 4's life, so it was built for hardware developers already knew well.

Released around the same time: Mirror's Edge Catalyst, Inside, The Witcher 3: Wild Hunt - Blood and Wine, The Witcher 3: Wild Hunt – Blood and Wine.

Official trailer

Sourced from the publisher’s YouTube channel.

Screenshots

All media

Quick answers

Root Letter — frequently asked questions

When did Root Letter come out?

Root Letter was released on 16 June 2016 for PlayStation 4, PlayStation Vita and PC (Microsoft Windows).

What are the minimum PC requirements for Root Letter?

At minimum, Root Letter needs Intel Celeron G540, 2 GB RAM, Intel HD Graphics graphics, 4 GB available space of storage.

How many GB is Root Letter?

The PC version needs about 4 GB of storage, going by the storage line in the system requirements ("4 GB available space"). Updates can add to that, and console versions have their own sizes, which are not listed here.

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