|Knights in the Nightmare|
|Preceded by||Yggdra Union: We'll Never Fight Alone|
|Neoseeker Related Pages|
|Twitch||Knights in the Nightmare Channel|
|YouTube Gaming||Knights in the Nightmare Channel|
Sting released a special edition version of Knights in the Nightmare, called the "Knights in the Nightmare DHE Series Special Pack", and it includes a copy of Yggdra Union: We'll Never Fight Alone for the Game Boy Advance. In the US, Atlus USA offered an art book (Tome of Lost Souls) as a pre-order bonus, and included a 39-track soundtrack (Symphony of Souls) with every copy of the game.
Battles take place in real time on an isometric grid. The wisp, controlled via the touchscreen, moves around and is how the player gives orders to allied units. When the wisp comes into contact with a unit that can act, an item can be selected, and the attack must be aimed by moving around the wisp. However, the wisp will be under constant enemy fire. The player must guide the wisp to dodge the shots as well as order the allied units to attack.
However, despite having a timer, time is only deducted for charging attacks and when the player's wisp takes damage. Thus the player has "unlimited" time to plan strategies and in this manner resembles other strategy role-playing games.
Permadeath exists as characters have a vitality stat which decreases when they use skills and other special circumstances. Vitality is replenished through leveling up, Transoul System, and other special circumstances.