The “no free lunch” challenges are commonly-used settings that remove some of the freely-accessible resources resulting from the open world nature of Free Enterprise.
The characters available in the Watery Pass, Damcyan, Mysidia, and Mt. Ordeals are considered “free” characters since they can be acquired simply by travelling to their locations. The
Nchar flag removes these five recruitment positions.
Normally, visiting sick Edward in Toroia Castle grants you a free key item (where the TwinHarp is awarded in vanilla FF4). The
Nkey flag moves this key item from Edward to Rydia's mother in Mist Village, who does not appear until D. Mist has been defeated. (Note that this refers to the D. Mist boss, not the boss found in the Mist Cave.)
The D.Knight, Waterhag, Karate, and K/Q Eblan fights have scripted alternate win conditions. Enabling
Nbosses removes these alternate conditions, meaning these bosses must be defeated outright.
Some enemies in boss fights do not have the “boss bit” set (for example, enemies within the Fabul Gauntlet). The boss bit prevents status conditions, instant death effects, etc. from applying, meaning that these weaker enemies can be more easily defeated by these effects. The
Nbosses flag also applies the boss bit to all enemies found in boss fights.
Note that due to technical limitations, if playing with the alt gauntlet, the boss bit will not be applied to the enemies in the alt gauntlet battles. (See Boss randomization for more information about the alt gauntlet.)