# System List Files

System list files are used across all of PCGen's abilities and should not be tampered with lightly, even for an experienced List Monkey! The next few sections describe each of the system list files and what they do.

There are 2 main sections to contend with, Game System files and System files.

Game System files are specific to the rules for a gaming system, such as 3e, Unisystem, D6, etc. These files define what rules apply for that system, such as Hit Points, vs Vitality Points, Armor Class vs Damage Reduction, etc.

System files are just that, files that the PCGen system uses. As such, these files are more susceptible, to errors, so edit them with care!