My AI Girlfriend Is Cheating on Me (v1.0.3) by Dynamics Lab

In this game, every character is an LLM-powered agent and simulated in real time, with their own memories, plans, relationships, and conversations.
As it turns out, LLMs and Netorare make a dangerously good combination.
You are Alex, a PhD student living overseas while your girlfriend remains behind. Before leaving, you secretly compromised her phone.
Through messages, social media, location data, recordings, and private thoughts, you can observe an autonomous cast of AI-driven characters living their own lives. They make plans, form relationships, interact with one another, and continue moving even when you are not watching.
How much can you trust her when attention is all you can offer from afar?​

Text based, AI CG, Male Protagonist, Netorare, Cheating, Dating Sim, Romance, Sandbox, Simulator, Voyeurism

Windows
1. Download the Windows executable.
2. Run the executable.
3. The build is unsigned. If Microsoft Defender SmartScreen blocks it, click "More info" and then "Run anyway".
4. Only continue if the file was downloaded from an official link in this thread.
Linux
1. Download the AppImage.
2. Mark it as executable if required.
3. Run the AppImage.
macOS — Apple Silicon
1. Download and open the DMG.
2. Drag the game into Applications.
3. Try opening it once from Applications.
4. If macOS blocks it, open System Settings → Privacy & Security.
5. Click "Open Anyway", then "Open".
AI Setup
1. Obtain an API key from a supported AI provider.
2. DeepSeek V4 Flash through the official DeepSeek service is currently the only tested and recommended setup.
3. Enter the provider details and API key during the game's onboarding process.
4. Set a spending limit in your provider account before playing.
Offline Setup
1. Run a model with Tool Calling support locally through LM Studio or Ollama.
2. Enter its local inference endpoint during the game's onboarding process.
3. Enter "ollama" or "lm-studio" as a local placeholder in the API Key field.

v1.0.3 — First Public Release
- Autonomous characters with their own schedules, memories, relationships, and daily activities.
- Dynamic messages, social media posts, locations, outfits, and character interactions.
- Monitor and Recordings apps for following Rin's surroundings and important events.
- Multiple relationship modes and story progression speeds.
- English support with an AI-translated Chinese localization.
- Manual saves and autosaves.
- Stable token cache rates of around 97% during normal play.
- Builds for Windows, Linux, and Apple Silicon Macs.

The game and its save data run locally. The AI simulation connects directly to an inference endpoint configured by the player, which may be either a remote AI provider or a locally hosted service.
When using DeepSeek V4 Flash, the typical API cost is around $0.10 per hour of play, although actual usage may vary.
The current release does not include scene artwork or AI-generated images. Support for connecting your own image-generation provider is currently in development.