PLEASE READ THIS AGREEMENT CAREFULLY. This Agreement may be presented to you on a store page (for example, Steam) before you download the Software, or inside the Software itself after installation. By downloading, installing, accessing, or using the Software, you ("you" or "User") acknowledge that you have read, understood, and agree to be bound by this End User License Agreement (this "Agreement"). If you do not agree, do not download, install, or use the Software. You accept this Agreement by clicking "I Agree" (or equivalent), by downloading or installing the Software, or by using it.


In Brief

This is a plain-language summary. It does not replace the full terms below; if the summary and the full terms ever conflict, the full terms control.


1. Definitions

2. Acceptance of This Agreement; Relationship to Steam

By installing, accessing, or using the Software, you confirm that: (a) you have read and understand this Agreement; (b) you agree to be bound by it; (c) you are at least 18 years old and have the legal capacity to enter into this Agreement; and (d) if any obligation herein is prohibited by the law of your jurisdiction, you will not perform that obligation and may not use the affected feature. If you do not agree, you may not install or use the Software and must uninstall and delete all copies.

This Agreement is an agreement between you and the Developer only. It is intended to operate as subscription terms for the Software within the meaning of the SSA. Your use of the Software through Steam is also governed by the SSA, the Steam Online Conduct Rules, the Steam Privacy Policy, and the Steam Refund Policy. If this Agreement and the SSA (or other mandatory Steam rules) conflict, the SSA controls with respect to your use of Steam and purchases made on Steam; this Agreement controls with respect to the Software and the AI Service.

The Developer is not affiliated with, sponsored by, or endorsed by Valve. "Steam" and the Steam names and logos are trademarks of Valve.

3. Grant of License

Subject to your ongoing compliance with this Agreement, the Licensor grants you a limited, personal, non-exclusive, non-transferable, non-sublicensable, revocable license to install and run the Software on devices you own or control, for your own personal, non-commercial use.

This Agreement does not grant you any right to:

These restrictions apply to the Developer's proprietary material and to the Software as a compilation. They do not limit rights granted directly to you by the licenses of third-party components or data identified in Section 14.3.

The Software is proprietary. All rights not expressly granted to you are reserved by the Licensor.

4. Your Account, Sign-In, and Session Storage

4.1 You Sign In With Steam

The AI features require the AI Service, and the AI Service requires a Steam account. When you sign in, Steam issues a short-lived cryptographic proof of your identity (an auth session ticket); the Software sends that proof to the AI Service, which verifies it with Steam and issues a Session Token to the Software. The Software never sees or handles your Steam password.

Use of the AI Service is tied to your Steam account. Do not share your Steam account for the purpose of sharing AI access: Story Credit entitlements are personal to your Steam account and your use of them is subject to the SSA, including Valve's rules on account sharing.

4.2 Session Tokens Are Stored in Your Operating System's Credential Store

Your Session Token is saved using your operating system's native secure storage: Windows Credential Manager on Windows, Keychain on macOS, and the Secret Service API (any compatible secret-service implementation) on Linux. This store encrypts the Session Token at rest and ties it to your operating-system user account. The Software does not write your Session Token to your Save Data, to any plain-text file, or to any location other than that store.

Because storage is tied to your user account and device, your Session Token is not portable: if you install the Software on another machine, you will sign in again. A Session Token grants access to your Story Credit Entitlement. Anyone who can sign in to your operating-system user account can use the Software with your Session Token and consume your Story Credits. Use a separate operating-system user account for each person on shared devices, and sign out (Settings → Sign Out) before handing over a device. You are responsible for charges and usage that occur through your Session Token.

Malware or another process running as your user may read your Session Token while the credential store is unlocked. You accept all remaining risk and are solely responsible for securing your device and accounts. If you believe a Session Token has been compromised, use Sign Out in the Software's settings (which revokes it on this device) and contact us.

Linux requirement. On Linux, a Secret Service API-compatible secret-service daemon and the libsecret runtime library are required. If they are missing, the Software will not be able to store your Session Token and will prompt you to set them up before you can continue.

4.3 Your Save Data Does NOT Contain Your Session Token

Your local database file (your Save Data) contains your Game State and settings — but not your Session Token. Your Save Data is safe to share, back up, or move; it does not disclose any live credential, and backups of it do not copy your Session Token.

5. Story Credits and Purchases

5.1 How the AI Service Is Metered

Use of the AI Service consumes Story Credits. The amount consumed varies with the AI model, the length of the conversation, and the content generated; the Software displays your remaining balance. The Developer curates which AI models are available and may add, remove, or reprice models at any time, which changes how quickly Story Credits are consumed.

5.2 All Purchases Happen on Steam

Story Credits may be purchased only through Steam's in-game purchase functionality using your Steam Wallet. All purchases are transactions with Valve under the SSA. The Developer does not sell Story Credits directly, does not process your payment, and does not receive your payment information. Do not attempt to purchase Story Credits through any other channel; the Software contains no other purchase facility.

5.3 Nature of Story Credits

Story Credits are a limited, revocable license to consume AI Service capacity. They are not property, have no cash value, are non-transferable (they cannot be sold, traded, gifted, or moved between Steam accounts), and — consistent with the SSA and Valve's requirements — cannot be redeemed or exchanged for real-world currency or for Steam Wallet funds. Story Credits are usable only within the Software.

5.4 Expiration

Story Credits that you purchase expire, and are forfeited without compensation, five (5) years after the purchase that granted them is credited to your account. The free starter allowance is promotional, carries no fixed term, and may be reduced, capped, or discontinued for new or existing players at any time.

5.5 Refunds and Reversals

Because purchases occur on Steam, refund rights are governed by Valve's Refund Policy (and, for EU and UK consumers, the statutory withdrawal information Valve provides) — not by the Developer. The Developer does not issue refunds and cannot override Valve's refund decisions.

If Steam refunds, reverses, or charges back a purchase, the Story Credits from that purchase are revoked and your Entitlement is reduced accordingly. If you have already consumed more than your revised Entitlement, your access to the AI Service may be suspended (while the Game itself remains installed) until your Entitlement again covers your consumption, you purchase additional Story Credits, or the Developer resolves the overdrawn state in your favor. The Developer may also revoke Story Credits obtained through fraud, abuse, or error.

6. The AI Service and Acceptable Use

6.1 Availability and Curated Models

The AI Service is an online service. It depends on systems operated by the Developer, by Cloudflare, by OpenRouter, and by the underlying AI model providers, as well as on Steam for sign-in and purchasing. None of these is guaranteed to be uninterrupted or error-free. The AI Service may be slow, rate-limited, degraded, or unavailable at times, and the curated model list may change. The Game's non-AI features remain usable locally when the AI Service is unavailable.

6.2 Acceptable Use

When using the AI Service, you agree to comply with the Steam Online Conduct Rules and applicable law, and you agree not to:

Violation of this Section 6.2 may result in suspension or termination of your access to the AI Service, at the Developer's discretion, without refund of consumed Story Credits. Your license to the Game itself is unaffected except as provided in Section 15.

6.3 Safety Controls, Logging, and Moderation

AI requests are subject to the Developer's safety policies and to OpenRouter Guardrails, which may detect and block prompt-injection attempts and may detect, block, or redact sensitive information before a request reaches an underlying model. These automated controls may reject a request or return an error instead of Generated Content. They do not detect every violation and do not guarantee that unsuitable content will never be generated.

The Developer creates an AI Interaction Record for each request. Automated systems may analyze these records for policy violations, abuse, safety issues, copyright concerns, and output-quality problems. Authorized Ten Turtle Games staff may review records that are flagged, reported, or selected as limited quality samples. The Developer does not engage contractors to review AI Interaction Records and does not use the records to train or fine-tune AI models.

The Developer may respond to suspected or confirmed violations by blocking requests, changing prompts or filters, removing a model or provider, restricting or suspending AI Service access, preserving relevant records, or taking other reasonable protective action. Collection, storage, review, retention, and deletion are described in the Privacy Notice.

7. AI-Generated Content Disclaimer

Generated Content is produced by AI in real time. Automated safeguards are applied, but no person approves each response before it is displayed. The Developer may analyze and review AI Interaction Records after generation as described in Section 6.3. Despite these measures, Generated Content may be inaccurate, incomplete, inconsistent, biased, offensive, culturally insensitive, or otherwise unsuitable. Because the Software is a Japanese-language game set in Japan, Generated Content may also misrepresent Japanese language, culture, geography, history, or people.

The Developer does not warrant the accuracy, reliability, legality, safety, appropriateness, or fitness of any Generated Content for any purpose. Generated Content is not professional, educational, medical, psychological, legal, or translation advice, and must not be relied upon as such. You are solely responsible for evaluating Generated Content and for any decision you make or action you take based on it.

8. Privacy and Data

The Developer acts as a data controller for the personal data described in this Section. In summary:

Do not enter sensitive personal, medical, financial, or confidential information into the Software — it will be transmitted to the AI Service and third-party AI providers, and may be retained in an AI Interaction Record before an automated guardrail can detect it. Full details, retention criteria, review practices, and your rights are in the Developer's Privacy Notice (legal/PRIVACY.md), which is part of this Agreement by reference. Valve is a separate, independent controller of your Steam account data; your use of Steam is governed by the Steam Privacy Policy.

9. Save Data, Backups, and Data Loss

Your Save Data is stored locally. The Developer is not responsible for lost, corrupted, inaccessible, or accidentally deleted Save Data. You are encouraged to maintain your own backups; as noted in Section 4.3, your backups will not contain your Session Token. The Software may change its storage format over time; the Developer does not guarantee that Save Data from one version will remain usable in future versions.

10. Disclaimer of Warranties

THE SOFTWARE AND THE AI SERVICE ARE PROVIDED "AS IS" AND "AS AVAILABLE", WITH ALL FAULTS, AND WITHOUT WARRANTY OF ANY KIND. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSOR EXPRESSLY DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT, AND ANY WARRANTY THAT THE SOFTWARE OR THE AI SERVICE WILL BE UNINTERRUPTED, TIMELY, SECURE, ERROR-FREE, OR THAT DEFECTS WILL BE CORRECTED. THE DEVELOPER DOES NOT WARRANT THAT THE AI SERVICE WILL WORK WITH ANY PARTICULAR MODEL, THAT ANY MODEL WILL REMAIN AVAILABLE, OR THAT THE SECURITY OF YOUR LOCALLY STORED DATA OR SESSION TOKEN WILL BE ADEQUATE. NO ADVICE OR INFORMATION OBTAINED FROM THE DEVELOPER CREATES ANY WARRANTY NOT STATED HERE.

11. Limitation of Liability

Consumer rights savings clause. For consumers with habitual residence in the European Union, the United Kingdom, Australia, or New Zealand, nothing in this Agreement excludes, restricts, or modifies the application of any guarantee, right, or remedy that cannot be so excluded, restricted, or modified, including those conferred by applicable consumer law.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE LICENSOR BE LIABLE TO YOU FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS, REVENUE, DATA, BUSINESS, GOODWILL, OR ANTICIPATED SAVINGS, ARISING OUT OF OR RELATING TO THIS AGREEMENT, THE SOFTWARE, THE AI SERVICE, OR YOUR USE OF (OR INABILITY TO USE) THE SOFTWARE OR THE AI SERVICE, WHETHER BASED ON CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, OR OTHERWISE, AND EVEN IF THE LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

WITHOUT LIMITING THE FOREGOING, THE LICENSOR SHALL HAVE NO LIABILITY FOR:

TO THE FULLEST EXTENT PERMITTED BY LAW, THE LICENSOR'S TOTAL AGGREGATE LIABILITY TO YOU FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THIS AGREEMENT, THE SOFTWARE, OR THE AI SERVICE SHALL NOT EXCEED THE AMOUNT YOU ACTUALLY PAID FOR THE LICENSE TO THE GAME ITSELF (excluding amounts paid for Story Credits, and excluding taxes). IF YOU OBTAINED THE GAME FREE OF CHARGE, THE LICENSOR'S LIABILITY SHALL BE LIMITED TO THE MAXIMUM EXTENT PERMITTED BY LAW (WHICH MAY BE NOTHING). SOME JURISDICTIONS DO NOT ALLOW CERTAIN LIABILITY LIMITATIONS OR EXCLUSIONS; IN THOSE JURISDICTIONS, THE LICENSOR'S LIABILITY SHALL BE LIMITED TO THE MAXIMUM EXTENT PERMITTED BY LAW.

12. Indemnification

You agree to defend, indemnify, and hold harmless the Licensor and their affiliates, successors, assigns, officers, and agents from and against any and all claims, demands, actions, losses, damages, liabilities, settlements, fines, penalties, costs, and expenses (including reasonable attorneys' fees) arising out of or relating to:

13. Age Requirement

You must be at least eighteen (18) years of age to install or use the Software. By using the Software, you represent and warrant that you are at least 18. The Software generates AI content in real time without human review before display. Automated safety controls and retrospective moderation are used, but Generated Content may nevertheless be unsuitable or offensive. The Developer does not knowingly make the Software available to anyone under 18.

14. Intellectual Property

14.1 The Software

The Software, including all code, text, graphics, audio, design, and other content created by the Developer, is proprietary and protected by copyright and other intellectual-property laws. The Developer retains all right, title, and interest in and to the Software. This Agreement grants you only a limited license (Section 3), not ownership. No rights in the Developer's trademarks or trade names are granted, and no license or right is granted in any Valve trademark.

14.2 Generated Content

Generated Content is produced by AI providers. Whether any person can own or enforce rights in AI-generated material varies by provider and by jurisdiction. The Developer makes no representation or warranty that you have any rights in Generated Content, and you are bound by the intellectual-property terms of the provider that produced it.

14.3 Bundled Third-Party Data

The Software bundles third-party components and datasets under their own licenses. Those materials are not relicensed under this Agreement. Each recipient receives the rights granted directly by the applicable third-party license, including any rights to extract, modify, or redistribute the material. No restriction in this Agreement applies to third-party material to the extent that it conflicts with those rights, and the Developer does not impose additional technological restrictions on exercise of those rights.

When an applicable third-party license requires attribution, notices, source identification, modification disclosure, or share-alike distribution, you must preserve those requirements. Materials released under CC0 impose no attribution condition. Details and license texts are provided in the Credits screen and the legal-notice files under bun/legal/. The bundled materials include:

15. Termination and Suspension

This Agreement is effective until terminated. Your rights terminate automatically and without notice if you fail to comply with any term.

Suspension of the AI Service (for example, for violation of Section 6.2 or an overdrawn Entitlement under Section 5.5) is not a termination of this Agreement: the Game remains installed and its local features remain usable, but AI features will not function during suspension.

Upon termination, you must cease all use of the Software and destroy all copies, including your Save Data. Story Credits, Entitlements, and Session Tokens are revoked upon termination. Sections that by their nature should survive termination (including but not limited to Sections 5, 7, 10, 11, 12, 13, and 14) shall survive. The Developer may discontinue, change, or stop offering the Software or the AI Service at any time, without notice and without liability, except as provided in Section 11.

16. Updates to This Agreement and to the Software

The Developer may update or replace this Agreement from time to time by changing the version and effective date. When the Developer does so, the Software will present the revised Agreement for your acceptance. Your continued use of the Software after such notice constitutes acceptance of the revised terms; if you do not agree, you must stop using the Software. The Developer may also update the Software at any time, with or without notice, and may add, change, or remove features, including AI models and AI Service functionality. The Developer has no obligation to provide any updates or to maintain the availability of any particular feature or model.

17. Governing Law and Disputes

This Agreement is governed by and construed in accordance with the laws of the Province of Nova Scotia and the federal laws of Canada, without regard to its conflict-of-laws provisions. The parties submit to the jurisdiction of the courts located in the Province of Nova Scotia for any dispute arising out of or relating to this Agreement or the Software, except that the Developer may seek injunctive or equitable relief in any court of competent jurisdiction to protect intellectual property. TO THE MAXIMUM EXTENT PERMITTED BY LAW, EACH PARTY WAIVES ANY RIGHT TO PARTICIPATE IN A CLASS ACTION LAWSUIT OR CLASS-WIDE ARBITRATION, AND ANY RIGHT TO A JURY TRIAL. Nothing in this Section limits any mandatory consumer dispute-resolution rights you may have in your jurisdiction of residence, or any rights you have against Valve under the SSA.

18. General Terms

19. Contact

Questions about this Agreement may be directed to:

Ten Turtle Games lostgaijin@tenturtle.games


By clicking "I Agree" or by downloading, installing, or using the Software, you acknowledge that you have read this Agreement, understand it, and agree to be bound by its terms.

© September 5, 2026 Ten Turtle Games. All rights reserved. "Lost Gaijin" is a trademark of Ten Turtle Games.

All other trademarks are the property of their respective owners.