Blue Protocol Postponed Network Test Dates Announced - Siliconera

Bandai Namco has given an update on the exact dates for the postponed Blue Protocol network test, previously scheduled for "late March 2023."

Blue Protocol Network Test Dated for January 2023 - Siliconera

Blue Protocol Network Test Details Coming Next Week : r/Games

Blue Protocol Network Test Postponed to March 2023 - Siliconera

Blue Protocol Network Beta Test Delayed Due to Difficulties - Siliconera

hack//G.U. - Wikipedia

Blue Protocol network test: start date, how to register, system requirements and more

Blue Protocol is Hosting a 'Network Test Status' Developer Livestream Next Week

Examples of cancelled/unreleased games seeing an official release many years later

News - November, 2020