Yes there is alot of official ways to delete your Account.
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You can't delete your account, you have to just stop logging in.
There is no way to delete your account. If you do not wish to posses an account anymore simply do not log on or use the account. Do not attempt to get your account banned as it may have undesirable side effects.
For a computer you can download and use Autoclicker. It's way faster than one by one.
by pressing delete?
There is no way to delete a Smallworld's account. Just don't get on your account and it will sort-of deactivate it. Hope that helps! :)