The Creation Kit - the official SDK for creating Skyrim and Fallout 4 mods - could only be acquired exclusively through this launcher which would of course be a problem for new modders once the service is taken offline.
Luckily, Bethesda has already made both the Fallout 4 and Skyrim Special Edition versions of the Creation Kit freely available on Steam. You can add them to your library by clicking on the banners below.
I have been able to confirm with Bethesda that both of these Creation Kit builds are compatible with the Steam and Xbox (PC) versions of their respective games. You should not need the Steam version exclusively to use these tools. However, it is unclear whether the CK will work seamlessly with the Virtual Reality versions of the games as modding for Skyrim VR and Fallout 4 VR is not officially supported by Bethesda.
The Fallout 4 Creation Kit appears to be much the same as the version offered by the Bethesda launcher, however, the version for Skyrim SE has been updated from 1.5.73 to 1.6.438.0. The update includes the following changes:
This, unfortunately, means that the new version is no longer compatible with the fantastic SSE CreationKit Fixes by Nukem. I spoke with Nukem earlier today who said he doesn't currently have the time to update CK fixes but is welcoming any assistance from contributors on the project GitHub page.
If you're using this addon, make sure to make a backup of the current Creation Kit files found in your Skyrim game folder (listed below) or use the Creation Kit Downgrade Patcher by Halgari.
- Tools (entire folder)
- Papyrus Compiler (entire folder)
- lex (entire folder)
Kudos to Otellino for the list.
It's important to keep in mind that this is not an automatic update, so there's no reason to overreact! If you have the version from Bethesda.net you do not need to download the Steam version. However, if you ever need to reinstall Creation Kit, Steam will be the only option from 11 May 2022 onwards.
As a reminder, you will also be able to migrate any games from the Bethesda.net launcher to Steam starting tomorrow (27 April 2022). You can read more about the migration process on Bethesda's website.