The title the Millionaire is currently unlocked by donating a total of 100,000,000 coins to the Deep Sea Whirlpool. It was obtained in the past by donating during one of the several instances of the Well of Goodwill being open.
This title changes according to the language of the server on which RuneScape is played, as shown below:
||[Name] der Millionär / [Name] die Millionärin
||[Name] le millionnaire / [Name] la millionnaire
||[Name] o Milionário / [Name] a Milionária
|This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!