The bonus DLC will not be downloaded automatically with the game. Please follow the steps below to download the bonus separately.
1. Open your library and select "The Centennial Case: A Shijima Story".
2. Click "Manage DLC", displayed in the DLC section on the right-hand side.
3. Tick the box next to the DLC that you wish to download.
If the game itself is already installed, then following the steps above will install the DLC.
(If the game itself has not yet been installed, the DLC will be downloaded and installed together with the game.)
How to redeem the Steam early purchase bonus
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.