Hi! Thank you so much for your purchase and for checking the license terms 😊
Yes, all of the uses you listed are allowed:
1. You may use the assets in commercial games.
2. You may use the same purchased assets in multiple commercial games/projects.
3. You may modify the models, materials, shaders, and textures as needed for your games.
4. You may keep the source assets in a private version-control repository accessible only to your development team or contractors working on the project.
5. You may distribute the assets as part of a completed game/product.
The main restriction is that the assets may not be resold, redistributed, or repackaged as standalone assets, asset packs, templates, or source content — whether on itch.io, the Unity Asset Store, or any other marketplace/platform.
This restriction also applies to modified versions of the assets. For example, changing the model, materials, adding new textures, or editing the existing textures does not make it okay to resell those assets as an asset pack.
However, modifying the assets for use inside your own game is completely fine, and you may commercially sell/distribute the finished game containing those modified assets.
Attribution is not required.
Thank you again for supporting my work! 😊