Play a cyberpunk RPG with an AI Game Master.
Neon, debt and bad contracts. An AI Game Master runs the city, plays every fixer, corp suit and street doc in it, and remembers exactly whose favour you spent. Free to start in your browser.
Or jump straight in, no setup:
Free to play in your browser and on Android. The full memory system is on every plan, including free.
Cyberpunk runs on leverage. Who owes whom, which fixer will still take your call, what the corp knows about you. That needs a Game Master that remembers, and most AI games forget the fixer's name by the third session. Auferet stores every named person, place and deal as a record it reads on every turn, so leverage actually accumulates.
Describe a runner in a sentence and the Game Master opens the scene. You type what you do in plain words. No sheet to build first, no group to assemble.
Recorded, four turns in
The city has not forgotten the last job
The opening
Rain slicked the neon-drenched alleyway as you slipped back into the city, your collar turned up against the biting wind. You had barely reached the dingy safehouse when your comms unit chirped, a harsh, rhythmic ping that echoed in the cramped space. A message from Vance, his voice cold and distorted through the static: "I know you're back, and I know about the Kowloon mess. I’m outside, and you’ve got ten seconds to open the door before I start making things very expensive for you."
Turn five, the call to Vance
> I call Vance and ask him to get me inside the tower.
You tap the comms unit, the signal crackling as Vance picks up almost instantly. "You've got a lot of nerve calling me, considering you're still empty-handed," his voice is sharp, vibrating with impatience. "Why should I help you get into the Tower District when you're already costing me money? Give me one good reason, or I'm hanging up and finding someone else to collect that debt from."
Recorded on 2026-09-10 on the free-tier model. A fresh account started from the seed line "I'm a runner who left a body in a corporate tower on the Kowloon job and still owes a fixer named Vance two hundred for it. I'm back in the city for one more job". The debt and the Kowloon job were set in the seed and never typed again: turn two puts the 200 credits on the screen, the bartender at turn three says the big names have scrubbed your frequency since Kowloon, and at turn five Vance takes the call and prices the debt into it. The body in the tower never came up by name in this run, so the page does not claim that recall. The Game Master's lines are cut to their first sentences here; the whole play, every turn, is published as a JSON file.
A few turns is short memory. Sixty is the test: five facts planted in the first turns of a story on the free model, asked about at turn 20, 40 and 60, once with only recent conversation to read and once with persistent memory.
| Asked at | Recent conversation only | Persistent memory |
|---|---|---|
| Turn 20 | 3 of 5 facts | 5 of 5 facts |
| Turn 40 | 1 of 5 facts | 5 of 5 facts |
| Turn 60 | 1 of 5 facts | 5 of 5 facts |
Run on 2026-08-22 and again on 2026-08-27 with the same result. Every question and raw answer is in the result file; the method is on the benchmark page.
What it keeps track of
A city that keeps its own books
A city that keeps records
Fixers, corps, gangs and clinics are stored as real entities with histories, so nobody resets to friendly.
Favours and debt
Who you owe and who owes you persists across sessions and gets called in when it hurts most.
Chrome and consequence
Implants, gear and conditions are tracked as you use them, including what you cannot afford to maintain.
Netruns and legwork
Talk, hack, tail, bribe or shoot. The Game Master resolves the approach you actually take.
Your own sprawl
Upload your city's lore as a PDF or text file and it becomes canon the Game Master plays inside.
Free to start
Free to start, and the full memory system is on every plan including free.
Getting in
One line and you are on the street
Open a browser
No launcher, no install. There is an Android app if you would rather have an icon.
Say who you are on the street
A runner, a fixer's errand boy, a corpo who just got burned. One line does it, or tap a scenario above.
Talk instead of picking options
Say what you do. The Game Master runs the city, everyone in it, and any dice the job calls for.
Leave, come back, still owe people
The job, the debts and everyone you crossed are exactly where you left them.
Questions
Running the sprawl, answered
Do I need to know a cyberpunk rules system?
No. Describe a runner in a line and play in plain language. If you want a full sheet and dice, switch on a system mode or build your own rules with a custom game mode.
Does it remember the people I deal with?
Yes. Every named fixer, corp contact and enemy is stored with their personality and their history with you, and read back whenever they appear.
Can I play solo?
Yes, solo is the default. You can also invite friends into the same city with a share code and take turns.
Can I use my own setting?
Yes. Upload your worldbook or notes and the Game Master runs your canon rather than a generic sprawl.
Is it free?
Sign in to play free, with 10 credits to claim every day. The memory system is identical on every plan.
What makes a cyberpunk campaign hard for an AI to run?
The web. Cyberpunk runs on who owes who, which corp you burned last job, and which fixer stopped taking your calls. That is a lot of state, and a game that only reads the last few messages loses it fast, so the gang you crossed in hour two greets you like a stranger in hour six. Holding that web is the whole difficulty, and it is what the memory system is for.
Can I run a heist or a netrun?
Yes. Describe the approach in plain words and the game master runs the consequences, including the parts that go wrong. You can play it purely narrative, or switch on a system mode so entries, alarms and firefights resolve on real dice instead of vibes.
Does it track cyberware and street cred?
It tracks them as part of your character and the story rather than through a built-in cyberware system, so implants, debts and reputation stay consistent because the world remembers them. If you want hard numbers behind that, build the rules you want with a custom game mode, or use one of the ready system modes.
Can I play it on my phone?
Yes. It runs in a mobile browser with nothing to install, and there is an Android app if you would rather have an icon. Your world is saved in the browser you play in, so export it first if you want to carry it to another device.
Pick a fight with something bigger than you.
The city keeps its own records, so the people you burn stay burned. Free to start, in your browser.
Play freePrefer it without the neon? Start a plain AI text adventure instead.
Got a crew? Run it as a multiplayer AI RPG and take the city on together.