- 9/10 (Thu) Update Change Notice - 26 August 2026
Greetings, Rune Hunters. With the update on 9/10 (Thu),a new season begins and changes occur in various contents in Undecember. Among them, prior notice is provided for contentsthat will be reset or terminated, so please check carefully. ※ Contents are subject to change upon update. Auction House Reset Notice ◆ Some Auction House functions unavailable notice- Schedule: Sep 7, 2026 (Mon) 11:00 ~ Until the New Season update- Action ①: New item registration in the Auction House is unavailable.- Action ②: Bidding on existing auction items is not available. ※ Items already listed in the existing Auction House can be purchased by for the remaining time. Season \ End Notice ◆ Move reference when converting to StandardInformation on the season play items and criteria that will convert from Season \ to Standard as the season ends. Move ContentsMove criteriaChaos StatueBased on the higher Chaos S…
- Connection Issues in the Russia Region - 14 August 2026
Greetings, Rune Hunters.An issue where some accounts in the Russia region are unable to access the game and use services. ■ Check Result Notice- There are no restrictions or blocks on access to specific regions in Undecember, and the servers are operating normally.- This issue is presumed to be due to local network conditions or the internet service provider (ISP) and is difficult to resolve through in-game measures. We ask for understanding that direct assistance cannot be provided toRune Hunters experiencing inconvenience related to Undecember usage.If additional information related to this is confirmed,it will be announced through the Undecember official channels.Thank you.
- Director's Letter Vol. 23 - 6 August 2026
Greetings, Rune Hunters.I'm Dusup Shin, the newly appointed PD of UNDECEMBER.Together with the development team, I will continue to further develop UNDECEMBER's unique brand of fun,and I will listen sincerely to the diverse feedback you, our Rune Hunters, share with us.As I greet you all from this new position, I'd like to first say that I look forward to working with you."The Forge" Season is gradually approaching its final stretch.I find myself wondering whether you, our Rune Hunters, have been enjoying your journey through this season.While our development team works to bring "The Forge" Season to a stable close,we are also accelerating our preparations to showcase expanded combat and growth enjoyment in the upcoming new Season.In this Developer's Note, we would like to introduce some of the key changes we'll be unveiling through the new Season.\In this new Season, we will be introdu…
- [Completed] Jul. 23 Scheduled Maintenance - 21 July 2026
Greetings, Rune Hunters. We would like to inform you that UNDECEMBER will undergo scheduled maintenance on Jul. 23 (Thu) to provide even more reliable game services. Please see below for more details on the maintenance schedule. Jul. 23 Scheduled Maintenance 1. Maintenance Schedule : Jul. 23 (Thu) 08:00 - 11:00 10:01 (UTC+9) 2. Maintenance Details 3. To Note ■ The maintenance schedule may change depending on circumstances. ■ Gameplay will be unavailable during maintenance, so please exit the game in a safe zone before maintenance begins. ■ Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. We hope the information above will help you avoid any inconvenience as you play the game. Thank you.
- Advance Notice on the End of Package and Product Sales - 20 July 2026
Greetings, Rune Hunters. We would like to inform you in advance that certain packages and products currently on sale at the Shop will no longer be available after the following dates. Please see below for more details. We hope the information will help you avoid any inconvenience. Advance Notice on the End of Package and Product Sales 1. Ending Date - After the Jul. 23 (Thu) scheduled maintenance 2. Products No Longer Sold from Jul. 23 (Thu) 3. To Note ※ The relevant packages and products will only be sold until the dates above. ※ Products you have already purchased, except for Pass products, can still be used normally even after the sale of the product ends. We will do our best to continue offering even better products to Rune Hunters. Thank you.
- Jul. 15 Server Patch - 15 July 2026
Greetings, Rune Hunters. UNDECEMBER will be undergoing a server patch on Jul. 15 (Wed) to address identified issues. Please refer to the following information for details. Jul. 15 Server Patch 1. Server Patch Schedule: Jul. 15 (Wed) 18:00 (UTC+9) * The server patch will proceed without maintenance. * The game will therefore be available to play while the server patch is underway. 2. Server Patch Details - Fixed an issue where character EXP was not properly acquired when defeating monsters in certain situations. - Game service stabilization 3. To Note - Please exit the game completely before logging in again for the patch to be applied. - Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. Please be advised that players may experience temporary disconnecti…
- Jul. 13 Server Patch - 13 July 2026
Greetings, Rune Hunters. UNDECEMBER will be undergoing a server patch on Jul. 13 (Mon) to address identified issues. Please refer to the following information for details. Jul. 13 Server Patch 1. Server Patch Schedule: Jul. 13 (Mon) 15:15(UTC+9) * The server patch will proceed without maintenance. * The game will therefore be available to play while the server patch is underway. 2. Server Patch Details - Game service stabilization 3. To Note - Please exit the game completely before logging in again for the patch to be applied. - Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. Please be advised that players may experience temporary disconnections while the patch is underway. We will always strive to maintain the quality and reliability of our services.…
- Jul. 9 Server Patch - 9 July 2026
Greetings, Rune Hunters. UNDECEMBER will be undergoing a server patch on Jul. 9 (Thu) to address identified issues. Please refer to the following information for details. Jul. 9 Server Patch 1. Server Patch Schedule: Jul. 9 (Thu) 19:50 (UTC+9) * The server patch will proceed without maintenance. * The game will therefore be available to play while the server patch is underway. 2. Server Patch Details - Fixed an issue where premium benefits such as did not function after purchasing Zodiac Pass 3. ※ If Ruby was consumed during gear item removal in Lacrima after purchasing Zodiac Pass 3, the consumed currency will be reimbursed. - Playtime Reward Tickets can no longer be sold in the shop. 3. To Note - Please exit the game completely before logging in again for the patch to be applied. - Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Are…
- Lucky Ddakji Draw Event Notice - 9 July 2026
Greetings, Rune Hunters. The has been prepared for Rune Hunters to enjoy a refreshing summer. Please see below for more details.
- Jul. 9 Update - 8 July 2026
Greetings, Rune Hunters. Our next update will take place on Jul. 9 (Thu). Please see below for more details. ※ The information may change when the update takes place. ※ All screenshots were taken on a test server and details may be subject to change.
- [Completed] Jul. 9 Scheduled Maintenance - 7 July 2026
Greetings, Rune Hunters. We would like to inform you that UNDECEMBER will undergo scheduled maintenance on Jul. 9 (Thu) to provide even more reliable game services. Please see below for more details on the maintenance schedule. Jul. 9 Scheduled Maintenance 1. Maintenance Schedule : Jul. 9 (Thu) 07:00 - 13:00 12:47 (UTC+9) 2. Maintenance Details 3. To Note ■ The maintenance schedule may change depending on circumstances. ■ Gameplay will be unavailable during maintenance, so please exit the game in a safe zone before maintenance begins. ■ Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. We hope the information above will help you avoid any inconvenience as you play the game. Thank you.
- Advance Notice on the End of Package and Product Sales - 2 July 2026
Greetings, Rune Hunters. We would like to inform you in advance that certain packages and products currently on sale at the Shop will no longer be available after the following dates. Please see below for more details. We hope the information will help you avoid any inconvenience. Advance Notice on the End of Package and Product Sales 1. Ending Date - After the Jul. 9 (Thu) scheduled maintenance 2. Products No Longer Sold from Jul. 9 (Thu) 3. To Note ※ The relevant packages and products will only be sold until the dates above. ※ Purchased products, excluding Pass/Attendance products, remain usable after the sale ends. ※ On 07/09 (Thu) update, the Summon Unique - Event Summon in the Paid Shop will end, and accumulated bonus points will be deleted. Gear Summon Tickets (Event) and chests containing these tickets owned will be deleted during the 07/09 (Thu) update. We will do our best to co…
- Jun. 26 Data Patch - 26 June 2026
Greetings, Rune Hunters. UNDECEMBER will be undergoing a data patch on Jun. 26 (Fri) to address identified issues. Please see below for more details. Jun. 26 Data Patch 1. Data Patch Schedule: Jun. 26 (Fri) 17:23 (UTC+9) * The data patch will proceed without maintenance. * The game will therefore be available to play while the data patch is underway. 2. Data Patch Details - Fixed an issue where some suffix option texts of Necklaces and Quivers were displayed as codes in Enchant and tooltips. 3. To Note - Please exit the game completely before logging in again for the patch to be applied. Please be advised that players may experience temporary disconnections while the patch is underway. We will always strive to maintain the quality and reliability of our services. Thank you.
- [Completed] Jun. 25 Scheduled Maintenance - 23 June 2026
Greetings, Rune Hunters. We would like to inform you that UNDECEMBER will undergo scheduled maintenance on Jun. 25 (Thu) to provide even more reliable game services. Please see below for more details on the maintenance schedule. Jun. 25 Scheduled Maintenance 1. Maintenance Schedule : Jun. 25 (Thu) 08:00 - 12:00 11:33 (UTC+9) 2. Maintenance Details 3. To Note ■ The maintenance schedule may change depending on circumstances. ■ Gameplay will be unavailable during maintenance, so please exit the game in a safe zone before maintenance begins. ■ Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. We hope the information above will help you avoid any inconvenience as you play the game. Thank you.
- Notice of Products Available for Sale After Jun. 11 (Thu) - 11 June 2026
Greetings, Rune Hunters. We would like to inform you about the new products that will be available for purchase after the update on Jun. 11 (Thu). You can find detailed information about these products in the guide below or in the and sections within the game. We appreciate your attention to this information when using the Cash Shop. List of Products on Sale 1. New Product and Package Sales 2. New Costume Shop Products and Packages 3. Season The Forge Zodiac Pass 2 4. Gear Summon (Event)
- Notice of Events Taking Place After Jun. 11 (Thu) - 11 June 2026
Greetings, Rune Hunters. We would like to inform you about the events that will take place after Jun. 11 (Thu). Please see below for more details. List of Upcoming Events 1. Souls Awakening in the Sweltering Heat Event 2. Total Playtime Event 3. Season The Forge Hot Time Event (2nd) ※ The Hot Time event will only be available in Season Mode. ◆ Souls Awakening in the Sweltering Heat Event ■ Event Period Jun. 11, 2026 (Thu) after maintenance ~ Jul. 9, 2026 (Thu) 23:59 (UTC+9) ■ Event Details You can obtain 'Ashes' by chance upon defeating monsters in the Chaos Dungeon stages. You can obtain Ashes only in Tier 1 - 10 Chaos Dungeon stages of Normal, Magic, Rare, and Legendary Grades. You cannot obtain Ashes from Unique Chaos Card, Traces of Memory, or Exodium or Greater Chaos Card. You can convert a Chaos Card to a 'Ash-covered Chaos Card' using Ashes obtained from 'Chaos Statue' at Saluto.…
- [Completed] Jun. 11 Scheduled Maintenance - 9 June 2026
Greetings, Rune Hunters. We would like to inform you that UNDECEMBER will undergo scheduled maintenance on Jun. 11 (Thu) to provide even more reliable game services. Please see below for more details on the maintenance schedule. Jun. 11 Scheduled Maintenance 1. Maintenance Schedule : Jun. 11 (Thu) 07:00 - 14:00 13:49 (UTC+9) 2. Maintenance Details 3. To Note ■ The maintenance schedule may change depending on circumstances. ■ Gameplay will be unavailable during maintenance, so please exit the game in a safe zone before maintenance begins. ■ Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. We hope the information above will help you avoid any inconvenience as you play the game. Thank you.
- Advance Notice on the End of Package and Product Sales - 9 June 2026
Greetings, Rune Hunters. We would like to inform you in advance that certain packages and products currently on sale at the Shop will no longer be available after the following dates. Please see below for more details. We hope the information will help you avoid any inconvenience. Advance Notice on the End of Package and Product Sales 1. Ending Date - After the Jun. 11 (Thu) scheduled maintenance 2. Products No Longer Sold from Jun. 11 (Thu) 3. To Note ※ The relevant packages and products will only be sold until the dates above. ※ Products you have already purchased, except for Pass products, can still be used normally even after the sale of the product ends. ※ The ongoing Storage/Character Name Change Ticket/Guild Name Change Ticket Discount Event will end with the 06/11 (Thu) update. ※ Content Supply Chest owned will be deleted during the 06/11 (Thu) update. ※ On 06/11 (Thu) update, S…
- [Completed] May. 28 Scheduled Maintenance - 27 May 2026
Greetings, Rune Hunters. We would like to inform you that UNDECEMBER will undergo scheduled maintenance on May. 28 (Thu) to provide even more reliable game services. Please see below for more details on the maintenance schedule. May. 28 Scheduled Maintenance 1. Maintenance Schedule : May. 28 (Thu) 07:00 - 12:00 (UTC+9) 2. Maintenance Details 3. To Note ■ The maintenance schedule may change depending on circumstances. ■ Gameplay will be unavailable during maintenance, so please exit the game in a safe zone before maintenance begins. ■ Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. We hope the information above will help you avoid any inconvenience as you play the game. Thank you.
- May. 26 Server Patch - 26 May 2026
Greetings, Rune Hunters. UNDECEMBER will be undergoing a server patch on May. 26 (Tue) to address identified issues. Please refer to the following information for details. May. 26 Server Patch 1. Server Patch Schedule: May. 26 (Tue) 18:20 (UTC+9) * The server patch will proceed without maintenance. * The game will therefore be available to play while the server patch is underway. 2. Server Patch Details - Fixed an issue where the damage of the Relic 's abnormally increased in certain situations. 3. To Note - Please exit the game completely before logging in again for the patch to be applied. - Please note that you will not be able to enter the Abyss Gate, Auction House, Constellation of Time, Arena, Chaos Dungeons, and Eunos Dungeons for 10 minutes before and after the patch. Please be advised that players may experience temporary disconnections while the patch is underway. We will alwa…
