General Trivia

The Ad Astra port to the Nintendo Switch marks Falcom’s first Switch game to be developed in-house rather than by a third-party company (Clouded Leopold Entertainment and Nippon Ichi).

Tropes

Acting for Two:
- In the Japanese dub:
  - Ryōtarō Okiayu voices Zechst and Argol.
  - Ami Naga voices Caelum and Colone.
- In the English dub:
  - Deneen Melody voices Eartha and Ada.
  - Jeannie Tirado voices Sasha and Erislette.
  - Mick Lauer voices Zechst and Gio.
  - Bob Carter voices Orbus and Argol.
  - Brittany Lauda pulls quadruple duty as Nemeas, Caelum, Colone and Bell.
- In both languages, Kenichi Suzumura and Alejandro Saab voices Cygna and Selam. This is because both were two half's of the same person.
Content Leak: Epic Games Store accidentally confirmed the localization prior to the official announcement by launching the store page too early.
Cross-Dressing Voices: In the Japanese version, voice actress Kaori Mizuhashi provides the voice of Nayuta. Meanwhile, the English dub has him voiced by the non-binary Casey Mongillo.
Fan Translation: Since the game was never officially translated into English until 2023, the only way for non-Japanese speakers to play it was using a fan translation, which can be found here.
Late Export for You: The game was originally released in Japan in 2012 and wouldn't see an official localization until 2023.
Playing Their Own Twin: Both Ami Naga and Brittany Lauda play the twin sisters Caelum and Colone.
What Could Have Been: Eartha was originally intended to be Nayuta's mother before the staff decided on making her his older sister instead.