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Undecember

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App ID 1549250
App Type Game
Store Name UNDECEMBER
Developer
Publisher LINE Games Corporation
Franchise LINE Games Corporation
Supported Systems Windows
Technologies nProtect_GameGuard AntiCheat, Unreal Engine
Last Changenumber 31694559
Last Record Update 15 October 2025 – 23:35:10 UTC ()
Release Date 12 October 2022 – 01:33:33 UTC ()
😐 52.30%
20k reviews
367
In-Game
+3
🎲 RPG 🛡️ Hack and Slash 💥 Action RPG 🆓 Free to Play 📦 Loot

UNDECEMBER is a Hack & Slash Action RPG in which players are able to surpass the conventional limits of skills by endlessly combining variety of Skill and Link Runes. Become a Rune Hunter and experience the joy of farming and growth!

Additional Information

This game is excluded from Steam Family Sharing because: Free Game

Developer Needs Games
controller_support full
ReleaseState released
Publisher LINE Games Corporation
IsFreeApp Yes
eulas
0 ↴
id1549250_eula_0
nameUndecember EULA
urlhttps://store.steampowered.com//eula/1549250_eula_0
version8
Exclude from family sharing (exfgls) 3 (Free Game)
Store Release Date 12 October 2022 – 01:33:33 UTC ()
osarch empty string
community_hub_visible Yes
3rd-Party DRM nProtect GameGuard
Social Media https://discord.com/invite/Q7syAnHfha
https://www.youtube.com/channel/UCO1YHH625KZdI66PjAEHDWQ/
Primary Genre Action (1)
Store Genres Action (1), Adventure (25), RPG (3), Free to Play (37)
Steam Release Date 12 October 2022 – 01:33:33 UTC ()
Store Asset Modification Time 1 September 2025 – 07:34:34 UTC () (1756712074)
library_assets
library_capsuleen,zh-cn
library_heroen
library_hero_bluren
library_logoen,zh-cn
library_headeren,zh-cn
logo_position ↴
pinned_positionBottomLeft
width_pct26.975993998499675
height_pct43.15491503733605
osextended empty string
name_localized
koreana언디셈버
schinese恶月十三
tchinese恶月十三
Is free on the store? Yes
review_score 5
review_percentage 52
Detected Technologies (?) nProtect_GameGuard AntiCheat, Unreal Engine, CEF SDK, NVIDIA_APEX SDK, NVIDIA_DLSS SDK, NVIDIA_Nsight_Aftermath SDK, NVIDIA_PhysX SDK, NvCloth SDK, Ogg SDK, Sentry SDK, Vorbis SDK, XAudio2 SDK
Steam Deck Compatibility
  • Steam Deck:
  • This game's launcher/setup tool may require the touchscreen or virtual keyboard, or have difficult to read text
  • This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
  • Entering some text requires manually invoking the on-screen keyboard
  • Some in-game text is small and may be difficult to read
  • All functionality is accessible when using the default controller configuration
  • This game's default graphics configuration performs well on Steam Deck
  • Note: This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
  •  
  • SteamOS:
  • This game runs successfully on SteamOS
  • Note: This game's launcher/setup tool may require a touchscreen or virtual keyboard, or have difficult to read text
  • Note: Entering some text requires manually invoking the on-screen keyboard
  • Note: This game does not default to external Bluetooth/USB controllers on SteamOS, and may require manually switching the active controller via the Quick Access Menu
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • test_timestamp: 20 October 2022 – 00:00:00 UTC
  • tested_build_id: 9722770
  • configuration:
    supported_inputgamepad
    requires_manual_keyboard_invoke1
    requires_non_controller_launcher_nav1
    primary_player_is_controller_slot_01
    non_deck_display_glyphs1
    small_text1
    requires_internet_for_setup0
    requires_internet_for_singleplayer0
    recommended_runtimeproton-stable
    requires_h2640
    requires_voice_files0
    gamescope_frame_limiter_not_supported0
    hdr_support0
Content Descriptors Some Nudity or Sexual Content (1), Frequent Violence or Gore (2), General Mature Content (5)
controllertagwizard Yes
First seen on SteamDB 9 February 2021 – 02:11:25 UTC (), in changelist #10687198
Content Descriptors (Including DLC) Some Nudity or Sexual Content (1), Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

11 Languages Interface Full Audio Subtitles
English Yes Yes Yes
Japanese Yes Yes
Traditional Chinese Yes Yes
Simplified Chinese Yes Yes
French Yes Yes
German Yes Yes
Portuguese - Brazil Yes Yes
Spanish - Spain Yes Yes
Thai Yes Yes
Russian Yes Yes
Korean Yes Yes Yes

Tags

🎲 RPG 🛡️ Hack and Slash 💥 Action RPG 🕹️ Multiplayer 🆓 Free to Play 📦 Loot 🧝 Dark Fantasy 💥 Action 🗺️ Top-Down 👥 Online Co-Op 🤝 Co-op 👤 Singleplayer 🎭 Fantasy 👤 Third Person 🌲 PvE 🦹 Character Customization 🍿 Cinematic 🥊 PvP 🌱 Realistic 🌆 Isometric

Categories

Single-player Online PvP Online Co-op Cross-Platform Multiplayer In-App Purchases Multi-player PvP Co-op

Hardware Categories

Full Controller Support DualShock Controllers (USB Only) DualShock Controllers DualSense Controllers (USB Only) DualSense Controllers

Assets

Load all asset images
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Assets
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community_icon6c11f10e6f438fde8e7ca4c51447be720e200a83.jpg
page_background_pathapp/1549250
raw_page_backgroundpage_bg_raw.jpg
timestamp3 September 2025 – 13:05:27 UTC
Trailers
429773 ↴
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423333 ↴
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423336 ↴
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