Yggdra Union: We’ll Never Fight Alone is a tactical role-playing game for the Game Boy Advance and PlayStation Portable, developed by Sting Entertainment as the second episode of the Dept. Heaven saga of games. Atlus USAlocalized and published both versions of the game in North America. 505 Games published the Game Boy Advance version in a limited number of European countries, such as Italy and France. A Nintendo DS side-game was released in Japan on December 3, 2009 as Yggdra Unison: Seiken Buyuuden.

The game is a tactical RPG with an overhead view of a 2D map, managing miniature versions of the units. A card system dictating unit movement and potential skills plays into both enemy and ally turns, as well as the “Union” formation system, in which massive battles can take place between several platoons. There are also some real time elements included during actual battle sequences, such as being able to control how units attack the enemy.