9/10 (Thu) Update Change Notice
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…

LINE Games
Undecember season countdown — current and next dates
Undecember season countdown — current and next dates
Total de temporadas
6
Duración prom.
111 días
Steam online
359
7d peak
45.9K
season actual
Undecember Season 11: The Forge launches following the conclusion of Season 10, bringing a leaderboard reset and new seasonal content with a fresh economy and ladder race.
Comenzó
14 may 2026
En curso desde
Siguiente season en
Temporada finalizada
Actualizado 13:00
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…
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…
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…
No end date has been officially announced for the current Undecember season yet.
The next Undecember season is estimated to start around 14 de septiembre de 2026. This is based on historical average season lengths and is not yet officially confirmed.
Yes — the date shown for the Undecember season is officially confirmed by the developer.
Undecember seasons typically last around 123 days, based on the average of recent completed seasons.
Season 11: The Forge
Undecember Season 11: The Forge launches following the conclusion of Season 10, bringing a leaderboard reset and new seasonal content with a fresh economy and ladder race.
New Age
The current Undecember season focuses on a large-scale skill overhaul, Season Mode progression through Abyss Gate New Age, and season-specific rewards and passes.
Abyss Gate
Abyss Gate centered on descending through Chaos Statue-linked dungeon depths with progressively stronger monsters and season-exclusive progression.
Starwalker
Season Starwalker added a new Season Mode cycle with its own gear, pass rewards, raid schedule, and season-limited progression systems.
Trials of Power
This season followed Re:Birth, resetting Void Rift progression and adding a new season-focused competitive cycle built around Trials of Power content.