You can download, install, and play UNDECEMBER through the LINE Games PC Client & STEAM.

Undecember can be downloaded, installed, and launched through the LINE Games launcher.

The launcher can be downloaded by clicking Download in the top menu of the LINE Games official site.

[LINE Games Launcher Download]

Downloaded files also require a separate installation process.

The launcher file allows checking the 'End User License Agreement'. After setting the required disk space and installation path, proceed with the installation.

Logging in with a LINE Games account is required to launch the LINE Games launcher. If no account exists, press 'Sign Up' to move to the website and register.

Selecting 'Stay logged in' will maintain the login state automatically when launching the launcher thereafter.

(* Recommended for use on personal PCs only for security.)

Launching the LINE Games launcher allows checking the list of games serviced by Line Games that utilize the LINE Games launcher.

Select Undecember from the game list, then press the 'Install Game / Start Game' button to play.

If not installed or update details are not applied, installation or update will proceed, and pressing start game again is required after completion.

Press ‘Install’ from STEAM’s UNDECEMBER page to install UNDECEMBER. After completing the installation, press ‘Play’ to launch the game client.

If there is an update available, the game will be updated first. You must press ‘Play’ again after completing the update.

[UNDECEMBER on Steam]