Baking Textures for Games

Hello, so my problem is this:

I havea whole room, with lots of objects with separate UVs, How can I bake all the objects without joining them, in 1 Texture?

Is this called a “Texture Atlas”? I am really lost, and baking 1 object at a time is really really slow process.

Any help?

Join them, Bake texture, then split them