Released October 1981 According to 'Official Gazette of the United States Patent and Trademark Office: Trademarks, Volume 1041, Issue 2', Treasure Island is trademarked by Data East USA as 'in commerce' October 1981.
Screenshots marked with 🍒 are created by syltefar and are considered public domain, free to use for anything. If you want to, you can note where you found it and link to this page.