[(C)△SEGA△ENTERPRISES, △LTD. , △1997]
"△" = space * [(C) [Official company name] [Year of first publication]].
There are no regulations regarding font or color. The year of first publication shall be the year of first release.
In cases where the original and this software were released in different years, such as commercial ports or remakes, the year is written as [Original publication year (earliest publication year)] and [This software publication year].
In the case of products other than SEGA brands, it depends on the contract, so be sure to check the copyright information in the contract.