D.Gray-man: The Apostles of God

D.Gray-man: The Apostles of God (ディー・グレイマン:神の使徒達, Dī Gureiman: Kami no Shitotachi) is an adventure game for the Nintendo DS based on the series.

About
It features a retelling of Allen’s first missions after joining the Black Order, from Mater to Krory’s Castle. Players may pick their choice of companions as they solve puzzles and battle Akuma in a race to reach the Innocence before the Millennium Earl.

The final chapter, a non-canonical story set in Cagliostro, contains three possible endings.

English Translation
An unofficial fan-translated English patch for the game was released in March 2019. It is fully playable and includes an accompanying walkthrough with a guide to unlocking the true ending.