Nukumori Robot Workshop
coc-o-4902 — maintenance console
CHECK()

Repair the Cocoro

Repair the Cocoro ── a repair-shop text adventure you play in the browser console

A broken caretaker robot is on your workbench, and you're the engineer. Diagnose her, repair her, and make "that choice" — all by typing real commands into your developer console.

▶ Open the game (free)
The caretaker robot "Cocoro" — long brown hair, light-blue rabbit ears, a white mechanical body with a battery panel on her belly

CHECK()

GenreText adventure (console-command gimmick)
PriceFree
PlatformDesktop browser only (uses the F12 developer console)
LengthAbout 15 minutes
ControlsClicking choices + typing commands into the console
EndingDecided by your final command (multiple endings)
LanguagesJapanese / English / Korean
ReleasedJuly 2024
Made byNukumori Robot Workshop (a React web game)

ABOUT()

This is a slightly unusual text adventure. You are a maintenance engineer. Today’s patient is Cocoro, a caretaker robot whose battery is near the end of its life. “No matter how much I charge, I get hungry again right away,” she tells you — and it’s your job to look her over and fix her.

What makes it different from an ordinary visual novel is that you operate the robot through a real developer console. Press F12 to open your browser’s console, type commands like CHECK() or OPENHATCH(), and Cocoro’s body responds exactly as instructed. Moving back and forth between the screen and the console — that gap is what this game really is.

But when you try to replace her battery, Cocoro refuses. It was a precious gift from the girl who used to own her. How will you handle the “command” that binds her? Your final command decides how this story ends.

screenshots

Cocoro happily says it's her first time being maintained by a human engineer, with a heart floating above her head
Your patient is Cocoro — thrilled to meet a human engineer.
After typing CHECK() into the console, the game shows "Initiating diagnostic program." in cyan text
Run CHECK() in the F12 console, and her diagnosis begins.
A manual panel reads "Press F12 to open the console and enter the following commands"
The in-game manual teaches you each real command.

→ Gallery: Cocoro illustrations & concept art

HELP()

STEP 01

Pick a language and listen

Choose one of three languages, hear out Cocoro's problem, and move the conversation forward with choices. Mouse only so far.

STEP 02

Open the console with F12

The game asks you to open the console. Press F12 (or right-click → Inspect) to open your browser's developer console.

STEP 03

Type the commands

Type CHECK() to run a diagnosis, OPENHATCH() to open her belly hatch, and so on. The on-screen manual shows every command, so you can just copy & paste.

FAQ

Do I really use the F12 developer console?
Yes — that's the whole trick. The console developers normally use becomes your workbench for operating the robot. Every command is listed in the in-game manual
Is it free?
Yes. It plays in the browser for free
Can I play on mobile?
It's desktop-browser only
How long is it?
A short piece
Is there only one ending?
No. The final command you give Cocoro decides how the story ends.
What languages are supported?
Japanese