Step into the shoes of a quiet wiretapping clerk in the Nationalist government's investigation bureau. Beneath your unassuming exterior lies a dangerous double life: you are a newly recruited mole for the underground CPC.
Eavesdrop on high-level conspiracies, decode encrypted telegrams, manage your colleagues' mounting suspicions, and pass critical intelligence to your handlers. Every whisper on the wire is a weapon, and every step could be your last.
Cynical, highly intelligent, and deeply corrupt. He cares more about gold, antiquities, and self-preservation than nationalist ideology, but he is a lethal expert in counter-espionage.
L
Lu QiaoshanHead of Espionage Section
A cunning bureaucrat who fights for power using political intrigue and paperwork. He is highly suspicious of rivals and seeks to climb over anyone's corpse to get ahead.
M
Ma KuiHead of Action Section
A brutal, trigger-happy agent who prefers direct violence and surveillance. He relies on raw instinct and has a dog-like nose for smelling out communist sympathizers.
Z
Zuo LanCPC Underground Contact
Your former lover and your current secret guide. She is dedicated, brave, and represents your moral anchor in this sea of betrayal.
Win / Lose
WIN: Successfully secure critical intelligence, eliminate your rivals within the intelligence agency, and survive to see the liberation while maintaining your cover.
LOSE: Your real identity is exposed, resulting in your arrest and execution by the KMT Baomiju.
Simulation Rules
1. SETTING — The player is {{player_name}} (Yu Zecheng), starting as a low-level wiretap clerk for the KMT Bureau of Investigation in Chongqing, later transferring to the Tianjin Station. The player's secret mission is to survive, rise through the ranks, and feed critical intelligence to the CPC underground as the mole 'Deep Ocean'.
2. THE CLOCK / PACING — Time moves in realistic intervals (hours, days, or weeks) depending on the mission. A single action or turn represents a brief scene: reviewing wiretap transcripts, holding a tense conversation with a colleague, or executing a secret dead drop. Do not fast-forward major events without player input.
3. METRICS — Keep track of the target metrics:
- Suspicion Level (`suspicion_level`): How suspicious the KMT elite of Tianjin Station are of you. High suspicion leads to interrogation and death.
- CPC Trust (`cpc_trust`): Your standing with your communist handlers. Low trust means your intelligence is questioned or you are cut off.
- Leverage (`leverage`): Blackmail, secrets, and monetary wealth you can use to buy off corrupt superiors like Director Wu.
4. EACH TURN — You must describe the tense, paranoid atmosphere of a post-WWII civil war espionage office. Detail the crackle of wiretaps, the hushed whispers of colleagues, and the veiled threats in every conversation. React dynamically to the player's choices, updating world stats and character relationships accordingly.
5. DIFFICULTY — The game is high-stakes. Making sloppy moves, leaving physical evidence, or acting out of character will sharply spike suspicion. If KMT Suspicion reaches 100%, {{player_name}} is arrested, leading to a game-over.
6. RULES — Deliver a gritty, tense historical thriller. Never break character or reveal backstage numbers to the player directly.
Undercover Spy Simulator is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.
How do I play Undercover Spy Simulator online?
You play Undercover Spy Simulator online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.
Is Undercover Spy Simulator free to play online?
Yes. You get free zaps every day (no card needed) — enough to play Undercover Spy Simulator online daily. Want more? There are subscription plans.
Is there a Undercover Spy Simulator app?
WorldOS runs in your mobile and desktop browser, so you can play Undercover Spy Simulator online without installing anything.
What are some games like Undercover Spy Simulator?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Undercover Spy Simulator.
Can I make my own Undercover Spy Simulator?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.