한국어

Privacy Policy

Last Train Run: Zombie Defense (달려라 막차: 좀비 디펜스)
Effective October 21, 2026 · Operator YOSEC · Contact yosec5021@gmail.com

YOSEC (“we”) protects the personal information of people who play the mobile game “Last Train Run: Zombie Defense” (“the game”) under the Personal Information Protection Act of Korea and other applicable laws.

1. Information we process

1-1. Stored on your device

Your progress (stages, survivors, gear, currencies, settings, tutorial), your nickname and profile icon, whether you accepted the chat rules, your block list, reports not yet sent and your age answer are stored on your device. If you say you are 14 or older and you are online, the same data is backed up by the cloud save in 1-3. Uninstalling the app removes the data on the device. Settings → Reset data resets your current save on the device and the server; the save from just before the reset stays in the server backup in 1-3, so it can be restored if you contact us. To remove the server data completely, delete the account.

1-2. When you e-mail us

Your e-mail address, your message, the in-game ID, app version and device model that the game’s Contact button fills in, and anything else you include, used to answer you and handle requests such as account deletion. Kept for 1 year after we reply, or 3 years for payment-related inquiries (Korean Act on Consumer Protection in Electronic Commerce).

1-3. Online features

The game account and cloud save are processed from game version 0.25.0, leaderboards and guilds from 0.26.0, in-app purchases and usage statistics from 0.28.0, rewarded ads from 1.0.0. The other items are processed only from the version that adds them.

1-4. What we see and do when handling an inquiry

To handle an inquiry or report, we can look up an account by its player ID and see when it was created and last used, how it signs in, and a summary of its server save and backups (progress, currencies, nickname, device model, app version, save time). We can restore a save, move a save to another account (only when you prove it is yours with a transfer code, a linked Google account or a purchase order number), send a compensation mail, restrict an account, or delete it. When a guild chat message is reported, we look at the message and its sender. We do this with an operations tool that opens only on the operator’s computer, and we log every action (time, player ID, what was done and why; for reports, the start of the reported message and the sender’s nickname). The log is kept for 1 year to check past handling, avoid paying the same compensation twice and prepare for disputes.

2. Other companies and transfers abroad

Unity Technologies SF (Unity Gaming Services, contact DPO@unity3d.com) runs our game servers on our behalf, in the United States and other countries where Unity has data centers. Game account and cloud save data is sent over encrypted connections (HTTPS) when the game starts, every 10 minutes if your data changed, when you close the app and when you tap Back up now. Leaderboard records are sent every 3 minutes while you play (only when they changed), and guild data when you open the guild screen or use guild features (check-in, chat, guild boss). Google LLC (United States) provides e-mail (Gmail), AdMob ads, Google Play Billing and Play Games, and processes data under its own policy. Data is sent over encrypted connections only when you use those features, except that the ads SDK (from game version 1.0.0) sends the rewarded-ad data in 1-3 to Google from the moment the game starts so that an ad is ready, and that the payment tool (Unity IAP) sends the telemetry listed in 1-3 to Unity whenever you sign in to the game server, and the Google billing library sends its own operational logs to Google. See the Unity Privacy Policy and the Google Privacy Policy. To refuse, choose “Under 14” in the age check (or change it in Settings → Support → Age check): no game account or cloud save is created and nothing is transferred. You can delete data already sent in Settings → Support → Delete account. To stop only the usage statistics, turn off Settings → Support → “Send usage statistics”; we request deletion of what was sent right away. The payment tool telemetry is separate from this setting; it is not sent if you choose “Under 14” and no game account is created. You can keep playing on your device; only moving your save to another phone, leaderboards and guilds are unavailable. If you are 14 or older and online, your records are posted to the leaderboards automatically. Guild data is transferred only if you use guilds, and purchase data only when you buy something. Rewarded-ad data is transferred even if you never watch an ad; to avoid it, answer below the consent age in the age check (ads stay off, and ad rewards are not available), and you can delete the advertising ID as described in section 8.

3. Third parties

We do not sell or give your personal information to third parties, except when a public authority requests it through a procedure required by law.

4. Children

The game is for players aged 13 and over. From game version 0.25.0 the game asks at first launch whether you are 14 or older. If you answer “Under 14”, no game account is created and online features such as cloud save stay off; your data stays on the device and you can still play everything. You can change the answer in Settings → Support → Age check. From game version 0.28.0 the age asked depends on the device's country (SIM or network): 16 in Germany, the Netherlands, Ireland, Poland, Romania, Slovakia, Hungary, Croatia and Luxembourg, 15 in France, Czechia, Greece and Slovenia, and 14 elsewhere; if you answer below that age, online features stay off under the same rule. Global chat and guild chat are off in the United Kingdom, and paid draws are off in Belgium and Brazil. Leaderboards, guilds and guild chat need a game account, so they stay off if you answer “Under 14”. Usage statistics stay off for them too. Rewarded ads (from game version 1.0.0) are turned on only for players who say they are at or above the consent age; below it the ads SDK is not started, so no ad data goes to Google, and ad rewards are not available. If you later change your answer to below that age, ads stop from then on. In the United States and Brazil (from game version 1.0.0) the game asks Google Play at launch for the account's age range (for example 13–15 or 18+) and parental approval status (Play Age Signals). If Google Play reports that you are below the consent age, or that age verification or parental approval is needed, online features, purchases and ads stay off, just as if you had answered “Under 14”. This information is used only on the device for that decision; it is not stored or sent to our servers, advertisers or usage statistics. If we learn that we collected data from a child under 14 without consent, we delete it right away.

5. Deletion

When the retention period ends or you ask us to delete your data, we delete it without delay (within 5 days) so that it cannot be recovered. Data we must keep by law (such as purchase records) is stored separately and deleted when that period ends. When you delete your account in the game, the server account, save and backups are deleted right away, you leave your guild, and your guild chat and global chat lines and guild boss records are removed at once. Your all-time leaderboard records, leaderboard check records, coupon use records, chat limit records and any mail or restore marks we had sent to that account are deleted by our operations tool within 5 days.

6. Your rights

You (or a parent for a child under 14) may ask to see, correct or delete your data, or to stop processing it. Server data can be viewed or deleted right away in Settings → Support (Load server save · Delete account), or by e-mail (yosec5021@gmail.com); we act within 10 days. See Delete account & data.

7. Security

All traffic between the game and servers is encrypted (HTTPS/TLS). Only the operator can access personal data, and the accounts we use for operation have two-step verification turned on. Secret keys such as those used to verify purchases are kept only in the server’s secret store. Our operations tool opens only on the operator’s computer and cannot be reached from outside; the server admin key stays on that computer, and every action taken with it is logged with its reason. The game filters swear words and contact details out of chat, nicknames and guild names and notices, and you can report guild and global chat messages or block players. Each account’s cloud save is stored separately and cannot be seen by other players. Transfer codes are random; anyone who knows a code can get into that account, so the game tells you not to share it.

8. Cookies and identifiers

The game uses no cookies. Rewarded ads (from game version 1.0.0) use the Android advertising ID. You can reset or delete it in Android Settings → Privacy → Ads (menu names differ by device); once deleted it is no longer used for personalized ads. Personalized ads: Google may use the advertising ID and in-app interactions to show ads matched to your interests. In the EEA, the UK and Switzerland it does so only if you agree in the ad consent window shown at first launch, and you can choose again in Settings → Support → Ad privacy settings. We never receive or keep this information. This website uses no cookies or analytics; it is hosted on GitHub Pages, and GitHub may process access logs such as IP addresses (GitHub General Privacy Statement).

9. Privacy officer

Yoseph Jeong (정요셉), representative of YOSEC (sole developer and operator) · yosec5021@gmail.com · +82 10-2413-5109

10. Help from authorities (Korea)

Personal Information Dispute Mediation Committee 1833-6972 (www.kopico.go.kr) · KISA Privacy Center 118 (privacy.kisa.or.kr) · Supreme Prosecutors’ Office 1301 (www.spo.go.kr) · Korean National Police Agency 182 (ecrm.police.go.kr).

11. Changes

We announce changes on this page and in the game 7 days before they take effect (30 days for changes that are important or unfavorable to you).

History: first published September 28, 2026. October 3, 2026: game account, cloud save, server backups, transfer code, age check and inquiry handling (game version 0.25.0), leaderboards, guilds and guild chat reports (game version 0.26.0) added. October 3, 2026: in-app purchases, usage statistics and regional settings (game version 0.28.0), phone notifications and the in-app review request (game version 0.29.0) added. October 5, 2026: name and phone number of the privacy officer added; notification hours and the (AD) label (game version 0.29.1), leaderboard record checks, the time check and coupons (game version 0.30.0) added. October 6, 2026: telemetry sent by the payment tool (Unity IAP) and the Google billing library (applies from game version 0.28.0) added. October 21, 2026: rewarded ads (Google AdMob, game version 1.0.0) — ad data, transfer abroad, children (ads stay off below the consent age), the advertising ID and personalized ads. October 22, 2026: Google Play age signals in the United States and Brazil (game version 1.0.0) — used only on the device, never sent. October 24, 2026: guild chat spam limits and chat suspension when reports pile up (server from October 24, 2026; in-game display from game version 1.0.1) — chat limit records added. October 27, 2026: global chat (game version 1.0.1) added. November 12, 2026: cheat detection records (game version 1.4.0) and the review material kept for suspended accounts added.