The Game Census
htoL#NiQ: The Firefly Diary cover art

htoL#NiQ: The Firefly Diary

Nippon Ichi Software, Inc. · NIS America, Inc. · 2016-05-18

Steam

AdventureStrategy

Modes: Single player

Releases: Feb 24, 2015 (PlayStation Vita), May 18, 2016 (PC (Microsoft Windows))

In the depths of a labyrinthine ruin, a young girl named Mion rises from a deep sleep. Lost, alone, and with no memory of how she got here or where her parents are, she is greeted by two fireflies—one composed entirely of light, and another who lurks among the shadows.

0
playing now
68%
positive of 635 reviews
Mixed
steam rating
50,000–100,000
owners (SteamSpy est.)
62/100
critic score (5 outlets, IGDB)
50/100
IGDB user rating (3 ratings)
platinum
deck/linux tier (ProtonDB)
$9.99
steam price (US)

0 players in-game as of 2026-08-30 08:00 UTC (census sample)

The story begins on December 31, 9999, when a young amnesiac girl by the name of Mion wakes at the bottom of a dark ruins within a desolate world. Following a desire to let Mion escape the rubble and see the outside world, the firefly Hotaru leads her on a journey upwards through the ruins. On her journey outwards, she finds unmanned machines, distorted vegetation, and bodies of dead children.(Storyline via IGDB)

Health check

Insufficient data
  • · Not enough review history collected yet to judge health.
  • · Top 37% of 11,450 Adventure games in the census by review count.
Estimated sales: 16k–38k copies

Review-multiple estimate from 635 total reviews — how this is computed.

All-time low: $1.99 at Steam (2020-09-10)via IsThereAnyDeal

12-month high $9.99 · on sale 14 of 29 observed days (census price snapshots)

Players online

202026-08-11 20:00 — 0 players2026-08-12 12:00 — 1 players2026-08-13 04:00 — 1 players2026-08-13 20:00 — 0 players2026-08-14 11:00 — 0 players2026-08-15 03:00 — 0 players2026-08-15 19:00 — 0 players2026-08-16 11:00 — 0 players2026-08-17 03:00 — 0 players2026-08-17 19:00 — 0 players2026-08-18 11:00 — 0 players2026-08-19 02:00 — 1 players2026-08-19 18:00 — 0 players2026-08-20 10:00 — 0 players2026-08-21 02:00 — 0 players2026-08-21 17:00 — 0 players2026-08-22 09:00 — 0 players2026-08-23 01:00 — 0 players2026-08-23 17:00 — 1 players2026-08-24 09:00 — 0 players2026-08-25 01:00 — 1 players2026-08-25 16:00 — 0 players2026-08-26 09:00 — 2 players2026-08-27 01:00 — 0 players2026-08-27 17:00 — 0 players2026-08-28 09:00 — 1 players2026-08-29 00:00 — 0 players2026-08-29 16:00 — 0 players2026-08-30 08:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$14.99$1.992016-05-182026-07-092016-05-18 — best price $13.492016-10-03 — best price $14.992016-12-19 — best price $9.892017-04-03 — best price $14.992017-07-20 — best price $9.992017-11-20 — best price $5.992018-01-29 — best price $9.992018-04-17 — best price $9.992018-07-16 — best price $9.992018-10-26 — best price $4.492019-01-01 — best price $9.992019-03-22 — best price $3.992019-06-01 — best price $9.992019-09-11 — best price $3.992019-11-21 — best price $2.492020-01-16 — best price $2.492020-03-26 — best price $9.992020-06-02 — best price $4.992020-08-21 — best price $2.492020-12-07 — best price $1.992021-02-20 — best price $4.992021-05-03 — best price $1.992021-07-15 — best price $9.992021-12-01 — best price $9.992022-02-05 — best price $9.992022-06-06 — best price $1.992022-10-31 — best price $9.992023-01-03 — best price $9.992023-05-05 — best price $1.992023-08-25 — best price $9.992023-12-21 — best price $1.992024-05-21 — best price $9.992024-09-02 — best price $9.992024-12-13 — best price $2.002025-05-03 — best price $9.992025-08-05 — best price $1.992025-11-24 — best price $1.992026-05-06 — best price $9.992026-07-09 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Details

WindowsFull controller supportSingle-playerSteam AchievementsFull controller supportSteam Trading CardsSteam CloudFamily Sharing2 DLC

2 supported languages: English, Japanese

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
PS Vita (PlayStation)1,42626%25
Steam (Steam)8619%24

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

2DCuteAnimeHorrorPuzzleStrategyAdventureDifficultAtmosphericSingleplayer

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Don't Knock TwiceToby: The Secret MinePLANET ALPHARusty Lake: RootsForgotton AnnePikunikuSemblanceDream Alone

Similarity via IGDB.

Official site ↗Wikipedia ↗