v3.25.1
Revenue from Contracts with Customers - Details of Revenue from Contracts with Customers based on Service Contract and Timing of Satisfaction of Performance Obligations (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue ₩ 500,845 ₩ 725,516 ₩ 463,618
At a point in time      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 111 119 25
Over time      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 500,734 725,397 463,593
Micro-transaction revenue      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 409,951 639,231 341,769
Micro-transaction revenue | Online game      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 61,425 70,566 80,147
Micro-transaction revenue | Mobile game      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 348,526 568,665 261,622
Royalties and license fees      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 72,714 71,390 106,259
Royalties and license fees | Online game      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 15,564 10,451 9,109
Royalties and license fees | Mobile game      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 57,150 60,939 97,150
Others      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue ₩ 18,180 ₩ 14,895 ₩ 15,590