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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 31762876
Last Record Update 20 October 2025 – 09:36:58 UTC ()
Release Date 12 October 2022 – 01:33:33 UTC ()
😐 52.31%
20k reviews
706
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

Assets

Load all asset images
clienticon 079bb26d3722c5f5edcdac93c3d4fd6bc8e85e31
clienttga d00c337dc644d85c05f71a37d643961535a12267
icon 6c11f10e6f438fde8e7ca4c51447be720e200a83
logo 837b4c02cf1d8679133658f7ed9d6939ef179420
logo_small 837b4c02cf1d8679133658f7ed9d6939ef179420_thumb
LinuxClientIcon f25e1964bd7053c92d8b122771adabbf6a0ca16b
small_capsule
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schinesef0b5c6c664b3eb0435448d4fc69126d1cb57cb2e/capsule_231x87_schinese.jpg
header_image
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schinese984f075aa2c3c6f391f5981d45b6949d924e7a74/header_schinese.jpg
library_assets_full
library_capsule ↴
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image/english05b40abc938c943cbc9fea37218ec3aa5c8641f9/library_capsule.jpg
image/schinese0903008e4a1fbc741618bfaae3540a80cb330c32/library_600x900_schinese.jpg
library_hero ↴
image/english722602384fdb7135738b70cd006de7b5fa631e3e/library_hero.jpg
image2x/english722602384fdb7135738b70cd006de7b5fa631e3e/library_hero_2x.jpg
library_hero_blur ↴
image/english722602384fdb7135738b70cd006de7b5fa631e3e/library_hero_blur.jpg
library_logo ↴
logo_position/pinned_positionBottomLeft
logo_position/width_pct26.975993998499675
logo_position/height_pct43.15491503733605
image2x/english236cefdd6ee4fdb8e811e4fad97fd77248c602c3/logo_2x.png
image2x/schineseaa5729fb7e194aa222d453a9d53b31cd7af2e0c2/logo_schinese_2x.png
image/english236cefdd6ee4fdb8e811e4fad97fd77248c602c3/logo.png
image/schineseaa5729fb7e194aa222d453a9d53b31cd7af2e0c2/logo_schinese.png
library_header ↴
image/englishb5f4f34f22a5077206bae47fd5ef216d867e22db/library_header.jpg
image/schinese984f075aa2c3c6f391f5981d45b6949d924e7a74/library_header_schinese.jpg
image2x/englishb5f4f34f22a5077206bae47fd5ef216d867e22db/library_header_2x.jpg
image2x/schinese984f075aa2c3c6f391f5981d45b6949d924e7a74/library_header_schinese_2x.jpg
Assets
main_capsuleb2eb01a88509942bd3ebe89905e6f4597c2b4fdc/capsule_616x353.jpg
small_capsuleca74bde399e358dd9ff82fd73f2c3b550be4af1d/capsule_231x87.jpg
header4e9d8e4edb50a79580ebf8e3bb98c22684ba90e8/header.jpg
page_backgroundpage_bg_generated_v6b.jpg
hero_capsule6b6f5cf4f4c36cf7780e92236bb34bd4b7fb971b/hero_capsule.jpg
hero_capsule_2x6b6f5cf4f4c36cf7780e92236bb34bd4b7fb971b/hero_capsule_2x.jpg
library_capsule05b40abc938c943cbc9fea37218ec3aa5c8641f9/library_capsule.jpg
library_capsule_2x05b40abc938c943cbc9fea37218ec3aa5c8641f9/library_capsule_2x.jpg
library_hero722602384fdb7135738b70cd006de7b5fa631e3e/library_hero.jpg
library_hero_2x722602384fdb7135738b70cd006de7b5fa631e3e/library_hero_2x.jpg
community_icon6c11f10e6f438fde8e7ca4c51447be720e200a83.jpg
page_background_pathapp/1549250
raw_page_backgroundpage_bg_raw.jpg
timestamp3 September 2025 – 13:05:27 UTC

Trailer 429773 ↴

trailer_name Act Boss Combat
trailer_category 0
trailer_480p ↴
video/webm 256867981/movie480_vp9.webm
video/mp4 256867981/movie480.mp4
trailer_max ↴
video/webm 256867981/movie_max_vp9.webm
video/mp4 256867981/movie_max.mp4
microtrailer ↴
video/webm 1549250/429773/6754d88d36d09900cbda166625eb3092ed06df92/1750700284/microtrailer.webm
video/mp4 1549250/429773/6754d88d36d09900cbda166625eb3092ed06df92/1750700284/microtrailer.mp4
adaptive_trailers ↴
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dash_h264 1549250/429773/6754d88d36d09900cbda166625eb3092ed06df92/1750700284/dash_h264.mpd
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screenshot_medium 256867981/movie.293x165.jpg
screenshot_full 256867981/movie_full.jpg
all_ages true
is_highlight true
timestamp 7 October 2022 – 07:56:54 UTC

Trailer 423333 ↴

trailer_name Play_PV
trailer_category 0
trailer_480p ↴
video/webm 256864097/movie480_vp9.webm
video/mp4 256864097/movie480.mp4
trailer_max ↴
video/webm 256864097/movie_max_vp9.webm
video/mp4 256864097/movie_max.mp4
microtrailer ↴
video/webm 1549250/423333/c9161e00e04616bdaeb1314e60ff29d10296e157/1750700233/microtrailer.webm
video/mp4 1549250/423333/c9161e00e04616bdaeb1314e60ff29d10296e157/1750700233/microtrailer.mp4
adaptive_trailers ↴
dash_av1 1549250/423333/c9161e00e04616bdaeb1314e60ff29d10296e157/1750700233/dash_av1.mpd
dash_h264 1549250/423333/c9161e00e04616bdaeb1314e60ff29d10296e157/1750700233/dash_h264.mpd
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screenshot_medium 256864097/movie.293x165.jpg
screenshot_full 256864097/movie_full.jpg
all_ages true
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timestamp 13 December 2021 – 10:46:04 UTC

Trailer 423334 ↴

trailer_name Cinematic_PV
trailer_category 0
trailer_480p ↴
video/webm 256864098/movie480_vp9.webm
video/mp4 256864098/movie480.mp4
trailer_max ↴
video/webm 256864098/movie_max_vp9.webm
video/mp4 256864098/movie_max.mp4
microtrailer ↴
video/webm 1549250/423334/21b67cd7825ac8c432855d2a0893677540112031/1750700248/microtrailer.webm
video/mp4 1549250/423334/21b67cd7825ac8c432855d2a0893677540112031/1750700248/microtrailer.mp4
adaptive_trailers ↴
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dash_h264 1549250/423334/21b67cd7825ac8c432855d2a0893677540112031/1750700248/dash_h264.mpd
hls_h264 1549250/423334/21b67cd7825ac8c432855d2a0893677540112031/1750700248/hls_264_master.m3u8
screenshot_medium 256864098/movie.293x165.jpg
screenshot_full 256864098/movie_full.jpg
all_ages true
is_highlight true
timestamp 13 December 2021 – 10:46:08 UTC

Trailer 423336 ↴

trailer_name Snack6_PV
trailer_category 0
trailer_480p ↴
video/webm 256864099/movie480_vp9.webm
video/mp4 256864099/movie480.mp4
trailer_max ↴
video/webm 256864099/movie_max_vp9.webm
video/mp4 256864099/movie_max.mp4
microtrailer ↴
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video/mp4 1549250/423336/71d39d6024d13ebfaaf9014b11be93db96fcc1dc/1750700251/microtrailer.mp4
adaptive_trailers ↴
dash_av1 1549250/423336/71d39d6024d13ebfaaf9014b11be93db96fcc1dc/1750700251/dash_av1.mpd
dash_h264 1549250/423336/71d39d6024d13ebfaaf9014b11be93db96fcc1dc/1750700251/dash_h264.mpd
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screenshot_medium 256864099/movie.293x165.jpg
screenshot_full 256864099/movie_full.jpg
all_ages true
is_highlight true
timestamp 13 December 2021 – 10:46:13 UTC

Trailer 426135 ↴

trailer_name Worldview_Eng
trailer_category 0
trailer_480p ↴
video/webm 256865904/movie480_vp9.webm
video/mp4 256865904/movie480.mp4
trailer_max ↴
video/webm 256865904/movie_max_vp9.webm
video/mp4 256865904/movie_max.mp4
microtrailer ↴
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video/mp4 1549250/426135/9bd35b24570d76cbabd3abb3f67bfb35b3cb37ad/1750700258/microtrailer.mp4
adaptive_trailers ↴
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dash_h264 1549250/426135/9bd35b24570d76cbabd3abb3f67bfb35b3cb37ad/1750700258/dash_h264.mpd
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screenshot_medium 256865904/movie.293x165.jpg
screenshot_full 256865904/movie_full.jpg
all_ages true
is_highlight true
timestamp 20 December 2021 – 11:17:29 UTC
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