Hammerking

Hammerking Terms of Service

Effective date: December 1, 2026

These terms set out the rules for using Hammerking and the rights and responsibilities of the company and players. Important points such as cancellations, refunds, service shutdown and limits on our liability are shown in bold. This is an English translation; if it differs from the Korean version, the Korean version prevails.

Article 1 (Purpose)

These terms govern the rights, obligations and responsibilities between AI PLANET (the "Company") and players when using the mobile game Hammerking and related services (the "Service"), which the Company provides under the name Luckle Studio.

Article 2 (Definitions)

(1) In these terms:

  1. "Player" means anyone who agrees to these terms and uses the Service, including players using a guest account.
  2. "Guest account" means the account created when you first open the app without signing in. Progress continues only on that device.
  3. "Google-linked account" means a guest account linked to a Google account. You can continue on other devices by signing in with the same Google account.
  4. "Member No." means the number we assign to each account, used to find your account when you contact us. You can see it in Settings → Account.
  5. "Content" means all digital content we provide in the Service, including the game, items and currencies.
  6. "Paid item" means an item you buy with money through Google Play billing (Gem packs, Remove Ads, Season Pass Premium, bundles and so on).
  7. "Gems" means the in-game currency, divided into "Paid Gems" bought with money, "Bonus Gems" received as extras, and "Free Gems" received for free from coupons, events and rewards (Article 19).
  8. "Game currency" means currencies earned by playing, such as Coins, materials and Medals. They cannot be exchanged for money.
  9. "Random item" means an item, such as a crate or sidekick kit, whose contents are not decided until you open it.
  10. "App store" means the place where you download the app and pay. Currently this is Google Play.

(2) Terms not defined here follow the relevant laws, our operating policies and general practice.

Article 3 (Company information)

We show our company name, representative, address (including where complaints are handled), phone number, email, business registration number, mail-order business report number, these terms and our privacy policy in the game under Settings → Account and in the Business information section at the bottom of this site.

Article 4 (Posting and changing these terms)

(1) We post these terms in the game (the first consent screen and Settings → Account) and on this site.

(2) We may change these terms within the limits of the law. We will announce the effective date, the changes and the reason in the game and on this site at least 7 days in advance. Changes that are unfavorable or important to you will be announced at least 30 days in advance and notified to you individually under Article 29, with the old and new text shown side by side.

(3) When the terms change, the consent screen appears again when you open the game. If you do not agree to the new terms you cannot keep using the Service, and you may delete your account under Article 26.

Article 5 (Matters not covered)

Matters not covered by these terms, and their interpretation, follow Korean law, including the Act on the Consumer Protection in Electronic Commerce, the Act on the Regulation of Terms and Conditions, the Game Industry Promotion Act, the Act on Promotion of Information and Communications Network Utilization and Information Protection, and the Content Industry Promotion Act, as well as the operating policies we announce in the game and general practice.

Article 6 (Eligibility and agreement)

(1) The Service is only for people aged 14 or older. People under 14 cannot use it, and we do not collect personal information from people under 14.

(2) The agreement is formed when, on the consent screen shown the first time you open the app, you agree to these terms and to the collection and use of personal information, confirm that you are 14 or older, and tap "Agree to All and Start" or "Start with My Choices". We record the version of the terms you agreed to and when.

(3) If we learn that someone under 14 confirmed they were 14 or older and used the Service, we will terminate that account's agreement and delete its personal information. Payments made on that account will be handled under Article 21(4) (cancellation of payments by minors).

(4) We may refuse an application, or terminate the agreement if we find out later, if:

  1. someone else's name or payment method was used;
  2. a restricted player signs up again to avoid the restriction; or
  3. the purpose is clearly to break the law or these terms.

Article 7 (Accounts)

(1) A guest account is created the first time you play. A guest account's progress continues only on that device. If you delete the app, clear its data or change devices, the progress cannot be recovered. We always show this warning under Settings → Account.

(2) You can link your guest account to a Google account at any time. Once linked, you can sign in with the same Google account on another device and continue.

(3) You must link a Google account before buying a paid item, so that payments and refunds can be matched to the right account. This does not apply to items bought with Gems.

(4) Your progress as stored on our server is the reference. If what is on your device differs from the server, the server copy applies.

(5) Only you may use your account. You may not sell, lend or transfer it. You are responsible for managing your Google account and device.

(6) For security, we may prevent one account from being used on several devices at the same time.

Article 8 (Profile ID and public information)

(1) You can set a Profile ID shown on leaderboards and elsewhere. It must be 2–10 characters of Korean, English letters or numbers, and cannot be numbers only. Each ID is unique, ignoring upper and lower case.

(2) Your first ID is set right away. You can change it 7 days after you last set it.

(3) Profanity, sexual words, impersonation of staff or others, and words that infringe others' rights cannot be used. We may remove such IDs, and you can then set a new one.

(4) Your Profile ID (or the name tag we assign if you have not set one), your leaderboard records, and the character card other players can borrow to keep fighting after they fall (its power and hammer, gear and sidekick setup) are visible to other players. Your Coins, Gems and payment records are not.

Article 9 (Privacy)

We protect your personal information under the relevant laws and our Privacy Policy.

Article 10 (Our obligations)

(1) We follow the law and these terms and try to provide the Service reliably and continuously.

(2) We maintain security measures to protect your personal information.

(3) Before you buy, we clearly show what a paid item contains, its price and conditions, which items cannot be cancelled, and the odds of random items.

(4) If your opinion or complaint is justified, we handle it promptly; if it will take time, we tell you why and when.

Article 11 (Your obligations and prohibited conduct)

(1) You must not:

  1. use someone else's account, Google account or payment method without permission;
  2. use or distribute programs we have not allowed, such as modified apps, hacking tools, auto-play tools, or memory or save-file editors;
  3. deliberately exploit bugs in the app or server for gain, or spread such bugs to others;
  4. take apart or modify the app, access our servers by unauthorized means, or overload our servers;
  5. repeatedly pay and then refund (cancel payments) with no real intent to use the purchase;
  6. buy or sell accounts, items or currencies for money or anything else of value;
  7. impersonate staff, Company employees or other players;
  8. use a Profile ID that is offensive to other players; or
  9. otherwise break the law, these terms or our operating policies.

(2) You must follow these terms and what we announce in the game.

Article 12 (Service and internet connection)

(1) In principle the Service is available 24 hours a day, all year.

(2) An internet connection is required. The app connects to our server when it starts, when a run starts and ends, and when you use the shop, crates, ad rewards and the mailbox. If the connection drops during a run you can keep playing, and the result is sent to the server when you are back online.

(3) To keep play fair, our server checks whether run results and earned currencies go beyond what can actually be earned. Records beyond that range are flagged for review by a person, and for things the server counts itself, such as crates, the excess is held aside rather than accepted immediately and is handled after review.

Article 13 (Changes, maintenance and shutdown)

(1) We may change the Service for operational or technical reasons and will announce changes in the game beforehand. Bug fixes, urgent updates and minor changes that are hard to announce in advance may be announced afterwards.

(2) We may pause the Service for maintenance, equipment replacement, network failures and similar reasons. We announce planned maintenance in advance, and a maintenance notice appears when you open the app.

(3) If we must end the whole Service for serious business reasons such as closing the business, the end of a contract or a severe drop in revenue, we will announce the end date, the reason and how you will be compensated at least 30 days before the end date in the game and on the Google Play app page, and notify you under Article 29.

(4) In that case we will refund unused Paid Gems and paid items with time remaining (for example Season Pass Premium) as described in Payments & Refunds.

(5) We will keep a refund channel (Customer Support email) open for at least 30 days after the Service ends.

Article 14 (Random item information)

(1) Under the Game Industry Promotion Act, for every random item, including crates and sidekick kits, we show every possible item and its odds, pity (guaranteed drop) conditions and other guarantee rules in the game's crate screen ("Odds" button) and on the Odds page of this site.

(2) What you get when opening a crate is decided and recorded by our server. The odds on this site are generated directly from the odds tables the game actually uses.

(3) Before changing any odds we announce it in the game and update the odds information at the same time.

Article 15 (Information collection)

(1) To run and improve the Service and prevent abuse, we may collect device information (model name, app version, language setting) and gameplay records. Details are in our Privacy Policy.

(2) If we ask you for additional information, for example to improve the Service, we will tell you that you may refuse, and you may refuse.

Article 16 (Ads and notifications)

(1) The Service shows ads served by Google AdMob: rewarded ads, which you choose to watch to the end for a reward, and full-screen ads shown after a run ends.

(2) If you buy "Remove Ads", full-screen ads no longer appear and rewards you would get by watching an ad are given right away without the ad.

(3) We send promotional notifications, such as events, discounts and gifts, only to players who have agreed in advance. Between 9 p.m. and 8 a.m. we send them only to players who have separately agreed to "Night Alerts". Promotional notifications start with "(Ad)" and say how to opt out.

(4) You can turn off "Event Alerts" and "Night Alerts" at any time in Settings → Account. We tell you the date and result whenever you agree or opt out, and every 2 years from the date you agreed we ask whether you still want to receive them.

(5) Notices needed to use the Service, such as maintenance, payments, refunds, account deletion and service shutdown, are not advertising and may be sent regardless of your notification settings.

(6) If you tap an ad and go to another company's service, that company is responsible for its service, unless the damage was caused by our intent or gross negligence.

Article 17 (Ownership)

(1) Copyright and other intellectual property rights in the Service and its content (art, sound, characters, software and so on) belong to the Company or the rightful owners.

(2) You have the right to use items and currencies you obtain in the Service, within the Service and under these terms. You may not convert them into money outside the Service or transfer them to others.

(3) You may not copy, distribute or commercially use the content without our permission. However, you may show your own gameplay in personal streams or videos unless we specifically say otherwise.

Article 18 (Purchases and payment)

(1) Paid items can only be bought through Google Play billing. Payment methods, limits and receipts follow Google Play's policies.

(2) The price shown in the shop and the payment window is the item's price. If you pay in another currency, the amount charged may differ because of exchange rates and fees.

(3) We deliver the item after the payment is complete and our server has verified it. While a payment is "pending", we do not deliver until it completes.

(4) A minor must have the consent of a legal guardian (such as a parent) to make a payment. If a minor paid without consent, the minor or the legal guardian may cancel the payment (Article 21(4)).

(5) Items bought with Gems (Revive Tickets, Parts Bundles, crate bundles, pass tiers, raid entries and so on) are delivered as soon as the Gems are spent.

(6) Season Pass Premium applies only to the season (14 days) in which you bought it. Please claim the rewards available to you before the season ends.

Article 19 (Gems)

(1) There are three kinds of Gems:

  1. Paid Gems: the base amount you receive when you buy a Gem pack;
  2. Bonus Gems: the extra attached to a Gem pack, plus the extra you get by doubling the first purchase of each Gem pack; and
  3. Free Gems: Gems received from coupons, events, rewards or grants from us.

(2) When you spend Gems, they are used in the order Free Gems → Bonus Gems → Paid Gems. Within the same kind, the ones that expire soonest are used first.

(3) Paid Gems and Bonus Gems can be used for 5 years from the date you receive them. Free Gems do not expire.

(4) Gems can only be used within the Service and cannot be exchanged for cash or moved to another account.

(5) If a payment is cancelled or refunded, we take back the remaining Paid and Bonus Gems from that payment. Any amount already spent becomes "Gems owed", which is paid back first from your next Gem pack purchase. While you owe Gems, you cannot spend Gems, and Free Gems handed out during that time are not received.

Article 20 (Cancellation (withdrawal))

(1) You may cancel (withdraw from) the purchase of a paid item within 7 days of the later of the purchase date or the date it became available, without any fee or penalty.

(2) However, the following cannot be cancelled against our will. If the purchase can be divided, the parts not listed below can still be cancelled.

  1. Items used or applied immediately on purchase: items bought with Gems (Revive Tickets, Parts Bundles, pass tiers, raid entries and so on), bundle contents already received, and Season Pass Premium rewards already claimed;
  2. Crates and sidekick kits that have been opened, since the result is decided when opened; and
  3. Gems from a Gem pack that have already been spent.

(3) Before you buy something that cannot be cancelled, we say so clearly in the purchase confirmation window ("Delivered right away, so the purchase can't be withdrawn.") and show the item's contents and odds in advance. If we fail to do this, you may cancel despite paragraph (2).

(4) If an item differs from its description or advertising, or is delivered differently from what was promised, you may cancel within 3 months of the date it became available, or within 30 days of the date you learned or could have learned of this.

(5) When a cancellation is accepted, we take back the item and start the refund to your original payment method through Google Play within 3 business days. If we are late, we add the late-payment interest set by law. The date the money actually arrives depends on Google Play and the payment provider.

Article 21 (Refunds)

(1) Within 48 hours of payment, you can request a refund directly from Google Play. Such requests are handled under Google's rules.

(2) After 48 hours, or if Google Play did not handle it, please email Customer Support. We handle refunds as follows. Calculations and examples are in Payments & Refunds.

  1. Gem packs: within 7 days of payment we refund the full value of the unused Paid Gems from that payment; after 7 days we refund that value minus 10%.
  2. Remove Ads: full refund within 7 days of payment.
  3. Season Pass Premium: full refund within 7 days of payment if you have not claimed any Premium reward.
  4. Bundles: full refund within 7 days of payment if you have not yet received the contents.
  5. Refunds caused by our fault (for example, you did not receive an item because of an error) are made in full with nothing deducted.

(3) Bonus Gems and Free Gems are not refunded. When the base payment is refunded, the Bonus Gems from that payment are taken back too.

(4) Cancellation of payments by minors: if a player under 19 paid without a legal guardian's consent, the player or the guardian may request cancellation, and after checking we refund the full amount. We decide whether the buyer was a minor based on the device used, who made the payment and whose payment method it was, and may ask for documents to confirm this. Cancellation is not possible if the purchase was made with money the guardian allowed the minor to spend, or if the minor tricked us into believing they were an adult or had consent.

(5) When a payment is cancelled or refunded, we take back the Gems and items from that payment (unopened crates, remaining Revive Tickets and raid entries, Remove Ads, Season Pass Premium and so on). Gems already spent are handled under Article 19(5).

(6) We may restrict refunds and use of accounts that repeatedly pay and refund with no real intent to use the purchase.

Article 22 (Overpayments)

(1) We refund in full any amount overpaid because of our error. If the overpayment was your error, you may have to bear the actual, reasonable cost of the refund.

(2) Because Google Play processes payments, refunds may follow Google Play's policies, and we will ask Google to take the necessary steps.

(3) Data charges for downloading or using the app are not refunded.

Article 23 (Coupons and event rewards)

(1) We may give free rewards through coupons and events. Each coupon has its own validity period and usage limit, and each coupon can be used only once per account.

(2) Entering too many wrong coupon codes in a short time may temporarily block coupon entry.

(3) We may take back coupon or event rewards obtained by improper means.

Article 24 (Restrictions)

(1) If you break Article 11, depending on how serious it is, we may:

  1. remove you from leaderboards and the borrowable character list;
  2. take back currencies or items obtained improperly, or delete leaderboard records;
  3. block access for a set period; or
  4. block access permanently.

(2) When our server finds unusual records, we first flag the account, and a person reviews it before access is blocked. We do not block access automatically.

(3) When we block access, the reason and period are shown when you open the app. We notify you in advance in principle, but for urgent or serious violations we may block first and notify you afterwards.

(4) If we receive a report that an account was stolen, we may suspend it until the investigation is finished.

(5) We are not liable for losses caused by a justified restriction.

Article 25 (Appeals)

(1) If you disagree with a restriction, you may appeal by emailing Customer Support with your reasons within 14 days of being notified. Please include your Member No.

(2) We reply by email within 15 days of receiving your appeal. If we cannot reply in time, we tell you why and when we will.

(3) If your reasons are valid, we lift the restriction and take any other necessary steps.

Article 26 (Termination and account deletion)

(1) You can end the agreement at any time with Settings → Account → Delete Account in the game. This also works for guest accounts. See Account & Data Deletion.

(2) After you request deletion, your account and all progress are deleted after 7 days. If you open the app within 7 days, you can undo it by tapping "Cancel Deletion" on the "Account Deletion Scheduled" screen. You cannot play while deletion is pending.

(3) Once deleted, your progress, items, remaining Gems, Remove Ads and Season Pass Premium are all gone and cannot be restored. If you need a refund, request it before you request deletion.

(4) Records we must keep by law, such as payment, Gem transaction and refund records, are kept separately for the required period with the link to you removed (see the Privacy Policy).

(5) Deleting the app alone does not end the agreement.

(6) If you seriously break these terms so that the agreement cannot reasonably continue, we may end it after giving you notice with a set period.

(7) Refunds and damages on termination follow the Content User Protection Guidelines and other relevant standards.

Article 27 (Damages)

If the Company or a player breaks these terms and causes loss to the other, they must compensate for it, unless there was no intent or negligence.

Article 28 (Limits on our liability)

(1) We are not liable if we cannot provide the Service because of natural disasters, war or similar unavoidable events.

(2) We are not liable for losses caused by events we are not responsible for, such as outages at telecom carriers, Google or other companies.

(3) We are not liable for losses caused by you, such as losing progress on a guest account by deleting the app or changing devices, or failing to manage your Google account.

(4) We have no duty to intervene in disputes between players or between a player and others, and are not liable for resulting losses.

(5) Unless the law says otherwise, we are not liable for the use of services provided free of charge.

(6) This article does not apply where the Company acted intentionally or with gross negligence.

Article 29 (Notices to players)

(1) To notify an individual player, we may use in-game notifications, the mailbox or pop-ups, or the email address of a Google-linked account.

(2) To notify all players, we may post a notice or pop-up in the game for at least 7 days instead of individual notices. Changes that are unfavorable or important to you will still be notified individually.

Article 30 (Complaints and disputes)

(1) We provide a channel for opinions and complaints (Customer Support email and phone) in the game and on this site.

(2) If an opinion or complaint is justified, we handle it promptly within a reasonable period; if it will take time, we tell you why and when.

(3) If a dispute cannot be resolved, you may apply for mediation to a dispute mediation body such as the Korea Content Dispute Resolution Committee. We will explain in good faith any action we took and take part in the mediation.

Article 31 (Governing law and jurisdiction)

These terms are governed by the laws of the Republic of Korea. Any lawsuit between the Company and a player will be heard by the court with jurisdiction under the Civil Procedure Act and other laws.

Addendum

These terms take effect on December 1, 2026.

Contact: Customer Support aiplanetcontact@gmail.com