Terms of Service

Last updated: 29 October 2026

These terms are the agreement between you and Shieldwall Games Ltd ("Shieldwall", "we", "us"), a company registered in England and Wales under company number 12655497, registered office 17 Chichester Road, Sandgate, Folkestone, Kent, CT20 3BN, United Kingdom. They cover the Mimir desktop app, your Mimir account, Mimir's online services, and anything you buy from us.

Please read them. If you are buying as a consumer, nothing here takes away your legal rights. Where these terms and a mandatory consumer law disagree, the law wins.

You can reach us at info@shieldwallgames.co.uk.

1. The short version

Your worlds are plain files on your own computer. They are yours. We never lock you out of them, and cancelling a plan never deletes, locks or changes them.
Mimir works offline for everything except Mimir AI and the online features, once you have signed in once (see section 4 for how paid features check in).
Paid plans renew automatically. We email you 15 days before each renewal. You can cancel any time, and your plan keeps working until the end of the period you paid for.
First-time subscriptions, content packs, collections and credit bundles come with a 14-day, no-questions refund (section 9).
Mimir is in public Beta. It is a finished, paid product that is still growing, so features will change and improve.

2. Mimir is in public Beta

"Beta" means we are still adding and refining features, and you may meet bugs. It does not mean your data is at risk: your worlds live on your own disk and Mimir keeps a version history of them. We will tell you about significant changes through the app or by email.

3. Your account

You need an account to buy anything and to use online features (Mimir AI, collaboration, hosted Campaigns, Proving Grounds and the Marketplace).
You must be at least 13 to create an account. If you are under 18, a parent or guardian must agree to these terms and make any purchase.
Keep your password safe. Tell us straight away at info@shieldwallgames.co.uk if you think someone else has used your account.
One person per account. You may not share or sell an account.

4. Local-first, and working offline

Mimir stores your worlds as markdown files in folders you choose. We do not receive a copy of a world because you create, open, edit or search it.

After you have signed in once, Mimir works without an internet connection for every feature except Mimir AI and the online services. While you are offline, the paid features your plan includes keep working for up to 7 days from the last time Mimir checked your plan. Connect once within those 7 days to keep them working. When you reconnect, Mimir checks your plan again, and any change to it, such as a cancelled subscription, then takes effect. CORE features, and every file you made, keep working throughout.

5. Your content

You own what you make. Your worlds, writing, files and art stay yours. Nothing in these terms transfers ownership to us.
What you let us do. When you deliberately use an online feature, you give us a limited permission to store, copy and process the content that feature needs, only to provide it to you and to the people you choose to share it with. For example: the context Mimir AI needs to answer a question, or a world you choose to host. The permission ends when you delete that content from the online service, except for backups that expire on their normal schedule.
Mimir AI. Mimir AI answers from your own world. We do not use your private content to train AI models, and we use our AI provider under terms that do not let it train on your requests.
Shared and hosted worlds. If you invite others into a hosted world, they can see and, where you allow, change what you share. You are responsible for having the right to share it.

6. Plans and prices

Plan	Monthly	Annual
CORE	Free	Free
APPRENTICE+	£6.99	£69.99
WORLDSMITH+	£14.99	£149.99
LOREMASTER	£24.99	£249.99

What each plan includes is shown in the app (Marketplace → Subscription) and on our pricing page. CORE is a permanently useful free plan, not a trial: unlimited local worlds and entries, the full local toolset, import and export. Every account gets 200 Mimir AI welcome credits once; paid plans add a monthly allowance, and credit bundles can be bought on any plan.

The checkout page shows the final price, including any VAT that applies, before you pay.

Founder programme. Every account created in the first six months of the public Beta gets, for life: a Founder badge, 25% extra credits on every Mimir AI credit bundle, 5% extra monthly credits on any paid plan, and 10% off Shieldwall content packs and collections. The perks are applied automatically. Subscription prices are never discounted.

Price changes. We may change prices. A change never applies to a period you have already paid for. We will email you at least 30 days before a new price applies to your subscription, and you can cancel before it does.

7. Subscriptions, renewal and cancellation

Automatic renewal. A paid plan renews automatically at the end of each month or year, at the price shown when you subscribed (or a new price we told you about under section 6), until you cancel.
Renewal reminder. We email you 15 days before each renewal with the date and the amount. You can turn these reminders off in the app (Account → Notifications → Renewal reminders).
How to cancel. In Mimir, open Marketplace → Billing → Manage billing details. This opens our payment provider's billing page, where you can cancel in a few clicks. You can also email info@shieldwallgames.co.uk and we will cancel it for you.
What happens when you cancel. You are not charged again. Your plan keeps working until the end of the period you have already paid for. After that your account moves to CORE. You keep every local file, any purchased credits, and every pack you bought, and you can subscribe again at any time.
Changing plan. Moving to a higher plan takes effect straight away, and you pay the difference for the rest of the current period. Moving to a lower plan, or switching between monthly and annual, takes effect at the end of the current period.
Hosted data after a downgrade. If you host more than a lower plan allows, the extra hosted content becomes read-only, then can be exported. It is never silently deleted.

8. Failed payments

If a renewal payment fails, our payment provider retries it 3 times over 14 days. If it still fails, we pause your subscription. We do not cancel it. Paid features stay on until the end of the period you already paid for, then pause until the payment goes through. We will email you when it pauses and again when it starts running again. You can update your card or pay the open invoice at Marketplace → Billing → Manage billing details.

9. Refunds and your right to cancel

9.1 Our 14-day refund promise

We give a full refund, with no questions, within 14 days of buying:

your first subscription to a paid plan;
a content pack or collection;
a Mimir AI credit bundle (see 9.3).

To ask, use Marketplace → Billing → Request a refund in the app, or email info@shieldwallgames.co.uk with what you bought and roughly when. We refund to the card you paid with, usually within 5 to 10 working days of approving it.

This promise is in addition to your legal rights in 9.2. The full policy is in our Refund Policy.

9.2 Your legal right to cancel (UK and EU consumers)

If you buy as a consumer in the UK or the EU, the law gives you 14 days to change your mind about an online purchase, starting the day after the contract is made.

Subscriptions. You can cancel within 14 days of first subscribing. If you asked us to start the service straight away, the law allows us to keep a fair amount for the days you used. Our promise in 9.1 is better than that: we refund in full.
Content packs and collections. These are digital content we deliver straight away. At checkout we ask you to agree to immediate delivery and to confirm you understand that you then lose the legal right to cancel. Our 14-day refund promise in 9.1 still applies.
Credit bundles. Credits are digital content we add to your account straight away. At checkout we ask you to agree to that and to confirm you understand that you then lose the legal right to cancel. Our 14-day refund promise in 9.1 still applies to the credits you have not used.

To use your legal right, tell us clearly within the 14 days, for example by email to info@shieldwallgames.co.uk. You may use the model cancellation form in the appendix, but you do not have to.

9.3 What a refund does

A refund reverses the purchase:

a refunded subscription ends, and your account moves to CORE;
a refunded pack loses its licence, so it stops receiving updates and cannot be reinstalled. Files the pack already put on your disk stay there;
a refunded credit bundle loses its unused credits, and the money returned is the share for those unused credits.

9.4 Renewals

Our 14-day refund promise covers first purchases, not renewals. If a renewal charged you by mistake, or you forgot to cancel, email us and we will look at it fairly.

10. Mimir AI credits

1 credit is worth £0.01 of Mimir AI use. How many credits a task uses depends on how much work it is, and Mimir shows an estimate before unusually large tasks.
Your plan's monthly credits reset each month and do not roll over.
Credits you buy do not expire, and stay on your account if you downgrade or cancel.
Monthly credits are used before bought credits.
If a Mimir or Shieldwall fault makes a task fail, it does not use your credits. Asking Mimir to regenerate an answer is a new task.
Credits have no cash value and cannot be transferred, except as a refund under section 9.

11. Content packs and collections

When you buy a pack, you get a personal, non-transferable licence to use its content in your own worlds and projects, including commercial projects you make with it, unless the pack's own page says otherwise. You may not resell or redistribute the pack's files as they are.

12. Using Mimir fairly

You agree not to:

break the law, or use Mimir to harass, threaten or harm anyone;
upload content you do not have the right to share into a hosted or shared world;
try to get around plan limits, credit charges or security, or reverse-engineer the online services;
overload or disrupt our services, or access them by automated means at unreasonable scale;
use Mimir AI to produce content that is illegal or that breaks our AI provider's usage rules.

We may suspend online features for an account that breaks these rules. We will tell you why, unless the law stops us. A suspension never stops you opening, editing or exporting the worlds on your own computer, or exporting your account data.

13. Deleting your account

You can delete your account in the app (Account → Data & account → Delete this account).

If you have a paid plan that would renew, cancel it first.
Deletion is scheduled for 30 days later. Until then you can cancel it, and you can export your account data.
We email you when deletion is scheduled, if you cancel it, and when it is complete.
Your local worlds are not touched. They are files on your own computer.
Some records (for example payment and tax records) are kept, no longer linked to you, where the law or fraud prevention needs them. Our privacy policy explains this.

14. Our responsibility to you

We provide Mimir with reasonable care and skill.
If we do not, and you are a consumer, you have legal rights to a repair, a replacement or a refund. This includes digital content that is faulty.
We are not responsible for losses we could not reasonably have foreseen, or for losses to a business (lost profit, lost business opportunity).
Your worlds are on your own computer, so please keep your own backups as well as Mimir's version history.
Nothing in these terms limits our liability for death or personal injury caused by our negligence, for fraud, or for anything else the law does not let us limit.

15. Changes to these terms

We may update these terms, for example when we add a feature or the law changes. We will tell you about important changes by email or in the app at least 30 days before they apply. If you do not agree, you can cancel and ask for a refund of any unused prepaid period.

16. Ending this agreement

You can stop using Mimir and delete your account at any time. We can end your access to online services if you seriously or repeatedly break these terms, with notice where we can give it. The app you installed, and your worlds, stay yours to use at CORE.

17. Law and disputes

These terms are governed by the law of England and Wales. If you live elsewhere in the UK or in the EU, you also keep the protection of your local consumer law, and you can bring a claim in your local courts. If something goes wrong, please email us first: most problems are quickest to fix that way.

Appendix: model cancellation form

(Complete and return this form only if you wish to cancel the contract.)

To: Shieldwall Games Ltd, 17 Chichester Road, Sandgate, Folkestone, Kent, CT20 3BN, United Kingdom, info@shieldwallgames.co.uk

I hereby give notice that I cancel my contract for the following digital content or service: ____________

Ordered on: ____________

Name: ____________

Email address on the Mimir account: ____________

Date: ____________