"The European Court of Justice said an individual has the right "to be forgotten" when such personal data "appear to be inadequate, irrelevant or no longer relevant, or excessive in relation to the purpose for which they were processed and in the light of the time that has elapsed." "
All data about you, minus explicit exclusions, must be provided.
The reason the data is being held.
If it will be passed on to other organisations or people.
Any data currently being processed and for what reason.
The reason any automatic decision is made, eg Banned by Anti-hack script.
Don't expect all data to be removed. If you have bans/strikes etc they can keep them for a reasonable time so that if you ever came back they have a record of them. But after the server dies or x years, that data needs to be deleted technically, unless there is a valid reason not to.