It is not recommended to include complex probability items in indie games. However, even if a game is an indie game (especially idle RPGs, etc.), if it includes probability items and fails to properly comply with regulations, it may be subject to corrective and recommendation orders from the Game Rating and Administration Committee, and additionally, may be held liable for compensating consumer damages.
The Game Rating and Administration Committee analyzes actual violation cases collected through monitoring in 2024–2025 from the perspective of indie game developers.
Basic Principles for Disclosure of Probability Information — If the game I service includes probability-type items, users must be able to calculate the accurate expected value before purchasing such items through the displayed information. Categories of Probability Disclosure Obligations: Games · Internet Websites · Advertisements and Promotional Materials (Act on Promotion of Game Industry)
Probability information must be displayed not only on the game and website but also on all advertisements and promotional materials promoting the game. This includes video advertisements, streamer advertisements, and social media image advertisements.
While general probability information is displayed, a common violation involves the omission of probabilities for certain content or specific items . Therefore, you must thoroughly check to prevent errors such as missing package components, unupdated short-term events, failure to display dice, roulette, or bingo items, failure to display pity rewards, or inability to access linked pages.
Probability information must be displayed not only on the game and website but also on all advertisements and promotional materials promoting the game. This includes video advertisements, streamer advertisements, and social media image advertisements.
Pity Reward Precautions — If the structure involves providing one item from among several items of the same grade rather than ‘guaranteedly one type’ of a specific item through the pity reward, you must also indicate the probability of each item being provided .
Ex) “Guaranteed SS character upon 100 attempts” → Need to display the list of SS characters and the probability for each character
Even if the components of probability-type items are grouped into the same grade , each item, option, and quantity may actually have different probabilities . It is inappropriate to disclose only the sum of probabilities by grade or to provide guidance using range values such as ‘A~B’.
If it is a system where probability changes under specific conditions, you must provide information on the probability situation before and after the change . You must specify the clearly changed numerical value rather than using abstract phrases such as ‘probability UP’.
Probabilities must be expressed as ‘percentages’; however, if it is difficult to display all digits, they must be rounded to at least four decimal places lower than the first non-zero digit . Arbitrarily determining the number of decimal places makes it difficult to compare subtle differences in probability.
The sum of the probability notations must be 100% , and all items must be displayed as a single number . Range and inequality notations such as ‘<1%' or '0.3%~0.7%' are inappropriate as they indicate actual probabilities only at an estimated level.
Probability values and the names of the items involved must always be presented accurately and consistently . Discrepancies frequently occur when only one side is modified after probability adjustments or due to translation errors.
If there is a guarantee system (pity system) that provides a fixed payout after a certain number of attempts , you must not provide only the ‘summed probability’ that includes the pity reward probability. You must clearly distinguish and display the base probability and the probability when the pity is triggered.
[Business Inquiry]
If you are unsure whether a legal violation has occurred, please contact the Game Rating and Administration Committee’s dedicated business support line.
- Dedicated inquiry channel for business owners regarding probability display standards, legal violations, etc.
- Email: grac_lbguide@grac.or.kr
- Phone number: 051-720-4260
- Required information: Name, Affiliation, Company Name, Game Title, Inquiry (It is recommended to include relevant legal provisions or explanatory document page numbers)
- Business Inquiry Form (Example): [Download]
If you do not have a relevant writing program, it is acceptable to refer to the form sent via email and fill it out similarly.
(25.12.22) Casebook of Violations Regarding Probability Information Display for Probability-Type Items [Download]
- This casebook contains collected examples of games monitored according to the probability information display standards for probability items in 2024–2025. Since these probability display standards may change in the future, please check the latest version of the file.
- The images included have been reprocessed, and the game name, items, etc. are unrelated to the actual game.
