DarkBlood -Gaiden is a role-playing game developed by toihaus for Windows. The game takes place at the end of the world, where a tower holds treasures that could grant wishes. The tower, known as the "Tower of No Return," attracts adventurers, but none of them ever returned. The king sends a group of knights to investigate the tower. The game features a new battle system, beautiful graphics, free character build, and various events.

The battles in DarkBlood -Gaiden are command-selective, and the skills that can be selected during battle depend on the weapon equipped. Combining weapons and magic that match the element of the enemy will give an advantage in battle. The graphic design, provided by Ginoya, who has designed dot pictures throughout the series, enhances the adventure. The character's status can be assigned to be an attack-oriented warrior, a magician who makes full use of magic, a well-balanced magic swordsman, and so on. The exploration of the tower is not only about vicious monsters, but also includes merchants who buy and sell items, hunters who try to kill you, and the release of traps in treasure chests.