htoL#NiQ: The Firefly Diary first launched for PS Vita in June 2014, followed by PC via Steam in May 2016.
Here is an overview of the game, via its store pages:
htoL#NiQ: The Firefly Diary is a puzzle action game where you guide a girl to escape from the ruins.
At the bottom of an old ruin, the girl who lost her memory Mion wakes up.
Guide Mion through the darkness with two fireflies, solve the contraptions and mysteries of the ruins, avoid the dreaded monsters and traps, and escape from the ruins.
- Fireflies guide Mion and illuminate the world of light.
- The Shadow Firefly illuminates the world of shadows and destroys obstacles and contraptions.
- Use the power of the two fireflies to switch between worlds of light and shadow and lead Mion out of the ruins.
- Inside the ruins are traps that could reap Mion’s life, puzzle-like contraptions, and unidentifiable monsters.
Watch a trailer for the smartphone version below.