Uploading Game to Steam

Hi all

I was wondering something related to Steam. From my experience (by downloading and installing games) most Steam games doesn’t seem to have an installer and instead Steam does the job. When you try to run the game for the first time, that is when EULA presents itself and asks if you accept or not.

So my question is, what about installers regarding Steam. Also if you don’t need an installer and Steam does the job for you, what about EULA? Oh, by the way, if you have done any game releasing on Steam, can you share your experiences?

Thanks in advance.