Probability-related errors were once treated as routine operational issues—something that could be resolved through a quick patch, an apology or limited in-game compensation.
In Korea, that assumption is no longer safe.
Mandatory probability disclosures, stronger consumer remedies and increasingly strict enforcement have transformed probability management into a business-critical compliance issue. A discrepancy between server logic and a public drop-rate table can now expose a game operator to refunds, regulatory investigations, civil claims and lasting reputational damage.
For overseas developers operating in Korea, probability compliance should therefore be managed as a core governance responsibility—not simply as a live-operations task.
In early 2026, Nexon announced full refunds for purchases made in MapleStory: Idle RPG during the affected service period after probability and performance-related discrepancies were identified.
Industry estimates placed the company’s potential refund exposure at approximately KRW 150–200 billion, or around USD 110–150 million. The final amount would depend on actual refund applications and other factors, but the announcement demonstrated how quickly a probability-related issue can develop into a major financial and reputational event.
This incident should be distinguished from the separate 2024 Supreme Court ruling involving probability disclosures in MapleStory. In that case, the Korean Supreme Court upheld a decision requiring Nexon to refund 5% of the individual plaintiff’s purchase amount.
The ruling did not establish an automatic right to a full refund in every probability-related dispute. It did, however, confirm that misleading or incomplete probability information may result in civil liability.
Probability errors are no longer minor operational mistakes. Even when caused by coding, synchronization or disclosure failures, they can affect consumer trust, regulatory exposure and a company’s balance sheet.
Operators should also avoid describing every discrepancy as an “unintentional bug” before completing a proper internal investigation. Regulators and courts may consider how the system actually operated, what consumers were told and how promptly the company responded.
In 2025, the Korea Fair Trade Commission took enforcement action against Webzen in connection with probability-based items offered in MU Archangel.
The case involved systems in which certain rewards could not be obtained during an initial range of attempts, although consumers were not clearly informed that the probability was effectively 0% during that period.
A pity system or progressive reward mechanism is not automatically prohibited. The compliance risk arises when the actual acquisition conditions—including any period during which an item cannot be obtained—are not accurately and clearly disclosed.
Depending on the structure of the system, operators may need to explain:
Post-incident corrections and compensation may be considered as part of a company’s response, but they do not erase the fact that consumers may previously have received incomplete or misleading information.
The safest approach is to review the entire reward logic before launch and disclose every condition that materially affects the player’s chance of obtaining an item.
Korea’s probability-item framework now combines mandatory disclosure requirements with stronger civil remedies.
Under the Game Industry Promotion Act, game operators must display required probability information accurately and in an accessible manner. Where an intentional probability-disclosure violation is established, a court may award up to three times the amount of proven damages.
This does not mean that every technical error automatically results in triple damages. The court considers factors such as:
Qualifying overseas game operators have also been required to designate a Korean domestic agent since October 23, 2025.
The domestic agent may perform statutory functions in Korea, including responding to regulatory communications, supporting post-management reporting and handling probability-disclosure obligations on behalf of the overseas operator.
Failure to comply with the domestic-agent designation requirement may result in an administrative fine of up to KRW 20 million.
Not every overseas developer is automatically subject to the requirement. Applicability must be reviewed against the statutory thresholds and the operator’s Korean service activities.
To assess whether the obligation applies to your company, use our Korea Domestic Agent Designation Checklist.
Global game operators should move from reactive troubleshooting to proactive probability auditing. The following five measures should form part of every Korean-market compliance program.
Do not wait until your company receives a regulatory notice.
Review whether your Korean user numbers, revenue and service activities meet the applicable domestic-agent designation thresholds. If the requirement applies, appoint a qualified Korean agent and establish clear communication and escalation procedures.
If you are currently comparing service providers, read our Guide to Choosing a Korean Domestic Agent.
Probability information should be managed through a single source of truth.
Development, publishing, localization, customer support and compliance teams should not maintain separate versions of the same probability table. Operators should establish unified standards for:
Any change to server-side logic should automatically trigger a review of the corresponding in-game and website disclosures.
Review every pity system, progressive rate-up mechanic, duplicate-protection rule and conditional reward structure.
The audit should identify:
If players cannot obtain a reward during any stage of the process, that limitation should be clearly reflected in the disclosure.
The probability information implemented in the game server must match the information displayed to consumers.
Operators should introduce an automated validation process comparing:
Manual copying and pasting creates unnecessary risk. Even a small decimal or rounding discrepancy can create a misleading impression when applied across a large number of transactions.
Probability compliance should not end with a pre-launch review.
Treat probability data as a high-priority Quality Assurance and compliance item throughout the game’s lifecycle. Conduct additional validation whenever an operator introduces:
Probability discrepancies should be escalated with the same urgency as other critical defects affecting paid content.
Korea’s probability-item rules have entered a new stage. Regulators, courts and consumers increasingly expect operators to demonstrate that their disclosed probabilities accurately reflect the game’s underlying systems.
Transparency is no longer simply a matter of player communication. It is an essential part of regulatory compliance, consumer protection and long-term market access.
For global developers, the most effective strategy is to verify probability logic, disclosure tables and domestic-agent obligations before a problem is reported.
TheGameAgent supports overseas game companies with Korean domestic-agent services, probability-disclosure reviews and regulatory communication. Contact our team to assess your Korean compliance framework before your next launch or major update.
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