Dev Log #1 – What is Den-Den: Tokyo Horror & How Do You Play It?

For those who’ve followed us from the start: yes, this really is Dev Log #1. Our old series was premature, and we had no idea what we were making back then. A lot has changed.

Today kicks off a regular dev log series running until the release of Den-Den: Tokyo Horror this summer (2026).

Without further ado, let’s get started with today's information drop which will answer the following important question, “What is this game and how do you play it?”.

Game Overview:

“Den-Den: Tokyo Horror is a J-horror RPG where events unfold in real-time. Survive eight hours in a city where every choice you make impacts the world around you. How many deaths will you be responsible for tonight?”'

We call it a J-Horror RPG because we’re making a first-person horror game set in Tokyo with RPG systems. The game takes heavy inspiration from Pathologic 2 and The Elder Scrolls (III–V).

Next, let’s discuss the basic rules of the game and how to play.

Important Game Rules:

If it doesn’t have rules, then it isn’t a game!

1. One playthrough lasts approximately 8 real-time hours (with minor variance from special mechanics).
2. Time flows 1:1 with real life. The clock almost never stops. (One second in the game is one second in real life, one minute in the game is one minute in real life, etc.)
3. The clock pauses only in menus or during conversations.
4. The game begins at 20:00 (8:00 PM) and ends at 04:00 (4:00 AM), when your final outcome is decided.
5. Almost every NPC can die — many because of your direct or indirect actions.
6. You can save anytime in the open world (Kagutaba), but not inside dungeons. Die, and you'll be forced to load from your last save.

How to Play - The Core Loop:

Den-Den: Tokyo Horror is an open-world horror game where you choose how to spend your limited time. Events happen in real-time across the city. You literally cannot be everywhere at once.

Innocents will die, and as the player you will have to decide who, where and what to focus your efforts on.

You play as a caregiver for the elderly. When the game starts, you are initially responsible for three patients. After a few hours into the game, you’ll be responsible for ten.

Every hour, each elderly person generates random needs (“Needs water”, “Needs cigarettes”, “Needs pain medication”, etc.). If you don’t deliver the items in time, their health drops. If all of them die the game is over. Keeping them alive until 4 AM is your ultimate goal.

In an open world game, it’s important that the player is given some form of direction, otherwise it would be like looking for a needle in a haystack.

Instead of traditional quests, you receive “Thoughts”, which come in the form of clues and objectives that appear in your Mind Map. Active Thoughts show up on your world map and Focus Compass (a toggleable compass at the top of the screen). Thoughts trigger from talking to NPCs, exploring, finding items, or entering dungeons.

NPCs roam freely around the city. Talk to them for info, items… or get told to fuck off.

Almost every single NPC in the game world can die, with the exception of a very small number. They can die because of you, because of someone else, or because they killed themselves.

Dark choices will have to be made by the player. Do I kill this innocent person for the chance of finding the money I need to buy medication? What will happen to me if I kill them?

Purchasing items from stores and vending machines requires money, so you’ll have to make sure you are earning enough to cover all of your expenses. Typically, players will need to scavenge as much as they can by looting. Scavenge trash cans, dumpsters, bags and anything else you can find. Recycle used items for cash. Manage your money carefully.

Several items in the game are converted into recyclable trash when used. For instance, when drinking a bottle of water, it will be converted into an empty bottle of water. The recyclable versions of items can be converted into cash by using a “Recycle Station”, which are located in different areas of the city.

The game world is divided into two main sections: Kagutaba and Dungeons.

Kagutaba is the name of the fictional Tokyo Ward that the game takes place in. Kagutaba is a large open world map. Scattered across Kagutaba are entrances to dangerous areas: haunted houses, sewers, abandoned offices, etc. These are filled with loot, enemies, and key objectives.

There are several threats in the world of Den-Den: Tokyo Horror, and players will need to be prepared to engage with enemies. Psychotic humans, mutated animals, paranormal entities, and worse. Most can be fought using regular weapons, but some require special items.

Players can save the game at any time while in the open-world Kagutaba level. Once they have entered a dungeon, they are unable to save the game again until they exit the dungeon.

If the player and their elderly patients survive until 04:00 (4:00 A.M), the game will end and your final outcome will be determined. Multiple endings await depending on who (and how many people) survive the night.

Den-Den: Tokyo Horror is a brutal, stressful, and deeply human horror experience. We’ve built something truly unique, and we can’t wait for you to play it.

Wishlist on Steam: Den-Den: Tokyo Horror on Steam
Follow us on X: @PlayFrozenLake

Sincerely,
Frozen Lake Software Dev Team