Files with ids file extension can be found as part of Infinity game engine from Bioware (Baldur's Gate etc).
Software that open ids file
IDS file extension - Infinity game engine
What is ids file? How to open ids files?
File type specification:
The ids file extension is associated with Infinity game engine created by Bioware Corporation and used in its computer games, such as Baldur's Gate.
The ids file stores resource, scripting or configuration data for the engine.
The default software associated to open ids file:
Company or developer:
BioWare
Baldur's Gate is a famous computer role-playing game created by BioWare and released in 1998.
List of recommended software applications associated to the .ids file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ids file, edit ids file, convert ids file, view ids file, play ids file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with ids file - Infinity game engine
Click on the software link for more information about Baldur's Gate. Baldur's Gate uses ids file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
Microsoft Windows:
Main software associated with ids file by default:
Baldur's Gate
Other suggested software:
Icewind Dale
Baldur's Gate II
Planescape: Torment