Your Steam Account and your Eternal Return nickname are different. In order to change your in-game nickname, the [Name Change] item must be used to change your nickname.
Please open Eternal Return, and go to Store - ETC - Account - Purchase Name Change
The first name change is free, subsequent changes cost 1,430 NP.
※ Please note nicknames must comply with our Terms of Use and Rules of Conduct.
※ Please be aware that restrictions may apply to nicknames and they can be changed without notice.