Do you want to close your Steam account? Well honestly: We’ve been checking all pages of the sites and while we were in the support pages, we understood why we couldn’t find a Delete button: It’s impossible to remove a Steam account, even not on written request to the support team.
These were the steps I went trough in my mission to cancel my Steam profile:
1 Intro: Checking out the support pages
they say literally: “Steam accounts are not automatically deleted. Additionally, accounts cannot be deleted by request.”
2 Stubborn as I am…
I went to http://store.steampowered.com/ssa_feedback and asked the Steam support team to remove my account with this request:
Dear Steam support team,
As I never bought anything trough and I’m not using it, I would like to ask you to remove my account.
My e-mail address is: [my email]
My associated Steam username is: [my username]
Can you please close my account and confirm me the removal aferwards?
3 Remove the Steam software from your computer
To do this on a Windows pc, go to: Start > Control panel > [Select Steam in the list] > Uninstall program.
In meantime I wait for a response of the Steam support team…
4 The answer from the Steam support team
never came, just like we expected and had read in the support pages: It’s not possible to have your Steam account removed, even not when there are no downloads or bought items linked to your account.
The Steam software is removed from your computer (as in step 3). Your account still exists somewhere in the cloud, but just leave it the way it is and move on with your life, accepting that it’s not possible to have it closed.
Source screenshots (& thanks to): Steam.com