Hi there! Any 90ties people here? I'm a software engineer from switzerland.

Anybody else remember the "Enter The Matrix" game? (https://en.wikipedia.org/wiki/Enter\_the\_Matrix) I actually spent most of my time in the terminal part of it. Now I got the chance to build my own with Claude!

grid.thetrader.ch. Free, no email, no signup form or else. You type a username you like and get your own box. After that it is help, man ssh, cat \~/README.txt, and you are on your own.

It is a multiplayer hacking sim that lives in a browser terminal. The commands are "real" (I used \*nix systems as a model) and they compose the way you would expect, so nmap -sn [10.0.0.0/16](http://10.0.0.0/16) | grep report does what it looks like it does. Cracks and miners run server side, so they keep going after you close the tab. Other players sit in the same address range as the NPC machines and nmap will not tell you which is which. Your money is a file. Anyone who can read it can take it off you. Go, MongoDB and xterm.js, roughly 23k lines.

Claude Code wrote most of that. 92 commits in three days, 81 of them co-authored.

The first session produced a design document instead of code.  
The document is in two halves. One is a log of why each decision was made, the other describes how the code works right now. New sessions only read the second half.

Every feature gets its own git worktree, plus its own port and database to test on. So I can have several Claude sessions running at the same time without them treading on each other, or on the server I am playing on.

It is three days old and runs on one small VPS, so it will break somewhere. Ask me anything about the setup.

There are:

* Other players and npc's
* Wallets with money to steal
* Cracking passwords and overtaking other machines
* Setup backdoors with ssh keys
* Rootaccounts with passwords
* Split Screens
* Some hardware involved for upgrading attack/defense mechanisms (market)
* Missions / Banks
* Clippy to help you :-)

If you dont know what a terminal or ssh or ls, cat etc is - this is maybe not for you. Unless you want to learn those things a bit.

Have fun - see you on the grid (I renamed to grid sorry ;D)

If this gets some traction I would implement more and more and more... Also: give me feedback -> what commands are missing, what didn't work? In the end: Its a vibe coded pile of code - lets see how long it holds

I built a multiplayer hacking-sim MMO that is nothing but a terminal: 3 days, 92 commits, 81 of them co-authored by Claude Code. Free, no signup.