PCGame

htoL#NiQ: The Firefly Diary

A puzzle-platformer where you guide a girl using two fireflies

Nippon Ichi Software, Inc. · Published by NIS America, Inc. · Released May 18, 2016

AdventureStrategy

Reviews
Mixed
68% of 618
Recent reviews
Not enough recent
Players
0
daily peak, Oct 30, 2026
Steam Deck
Playable
Last update on Steam
10 years ago
Oct 19, 2016
Minimum PC
HD Family
2 GB RAM · 2 GB disk
Full requirements

What is htoL#NiQ: The Firefly Diary?

In this 2D puzzle-platformer, Mion awakens in an old ruin without knowing how she arrived. You move Lumen to direct her and use the shadow firefly Umbra to destroy obstacles, solving puzzles and avoiding monsters and traps on the way to the surface.

For you if...

  • +you enjoy difficult puzzles in a dark, unsettling setting

Not for you if...

  • −you want to control the main character directly

What players say

68% of 618 reviews are positive

Players praise the art style and mysterious storytelling. Common complaints concern clunky controls, slow movement, and hazards that leave little room for error.

Screenshots and trailer

htoL#NiQ: The Firefly Diary screenshot 1

htoL#NiQ: The Firefly Diary system requirements

Minimum: HD Family, 2 GB RAM, 2 GB of disk space.

As published by the developer.

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Minimum

OS
Windows 10/8.1/7/Vista
Processor
Intel Core i3-2310M 2.10 GHz
Graphics
Intel HD Graphics Family
Memory
2 GB RAM
Storage
2 GB available space
DirectX
Version 11

Recommended

OS
Windows 10/8.1/7/Vista
Processor
AMD A10-5800K APU with Radeon™ HD Graphics
Graphics
NVIDIA GeForce GTX 560 Ti
Memory
2 GB RAM
Storage
2 GB available space
DirectX
Version 11

Does htoL#NiQ: The Firefly Diary have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Does htoL#NiQ: The Firefly Diary run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Default controller config not fully functional
  • Shows Steam Deck controller icons
  • In-game text is legible on Steam Deck
  • Default graphics settings perform well on Steam Deck
  • External controllers are not supported for the primary player

PC version details

DRM
None declared on Steam
Controller
Full controller support
Platforms
Windows
Achievements
24
Steam features
Cloud saves, Family Sharing, Trading cards
Languages
Text only: English, Japanese.

Does htoL#NiQ: The Firefly Diary use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam

Tags

2 DLC available.

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