The House Rules tab allows certain house rules to be applied. These are customizable rules that are not the default guidelines establishbed by the Players Handbook. These are Gritty AC mode, Gritty HP Mode, Cross Class Skill Cost, Bypass Max Skill Rank, Bypass Feat Prerequisites, Bypass Class Prerequisites.
The Gritty AC Mode and Gritty HP Mode are features implimented by the Sleeping Imperium. These allow for more realistic rules for damaging specific body parts, armor pieces, and weapons. These have not been implimented yet. For any information on the rules see Grim and Gritty HP Document
The Corss Class Skill Cost determines the value of taking a skill that you is not part of your class. Normally the default is 2, this options allows you to choose: 0,1,2. This is the cost in skill points to take a skill that is a cross-skill for your class.
The Bypass Max Skill Rank allows the user to ignore the maximum level for their skills (3+level) and take as many points in any skill as they wish.
The Bypass Feat Prerequisites allows the user to ignore the prerequirements for a feat.
The Bypass Class Preqequisites allows the user to ignore the prequirements for a class and allows them to qualify for any class available.