Skills
Skills represent some of the most basic and yet most fundamental abilities your character possesses. As your character advances in level, he can gain new skills and improve his existing skills dramatically. This section describes each skill, including common uses and typical modifiers. Each skill is based in an ability score and gains a skill bonus or penalty accordingly.

Table: Skills
AbilitySkills
StrengthAthletics
DexterityMobilityTrickeryStealth
IntelligenceKnowledge (Arcana)Knowledge (World)
WisdomLore (Nature)Lore (Religion)Perception
CharismaPersuasionUse Magic Device

Acquiring Skills
For the first 7 levels of a character's growth, they gain a number of skill ranks dependent upon your class and allegiance plus their primary statistic modifier. Investing a rank in a skill represents a measure of training in that skill. Each player may never have more ranks in a skill than their total number of Hit Dice.

Class Skills
In addition, each class has a number of favored skills, called class skills. It is easier for your character to become more proficient in these skills, as they represent part of his professional training and constant practice. The player gains a +3 bonus on all class skills that you put ranks into. If you have more than one class and both grant you a class skill bonus for a specific skill, these bonuses do not stack.

Skill Checks
When your character uses a skill, he isn’t guaranteed success. In order to determine success, whenever you attempt to use a skill, you must make a skill check. Each skill rank grants a +1 bonus on checks made using that skill. When you make a skill check, you roll 1d20 and then add your ranks and the appropriate ability score modifier to the result of this check. If the skill you’re using is a class skill (and you have invested ranks into that skill), you gain a +3 bonus on the check. If you are not trained in the skill (and if the skill may be used untrained), you may still attempt the skill, but you use only the bonus (or penalty) provided by the associated ability score modifier to modify the check. Skills can be further modified by a wide variety of sources—by your race, by a class ability, by equipment, by spell effects or magic items, and so on.

If the result of your skill check is equal to or greater than the difficulty class (or DC) of the task you are attempting to accomplish, you succeed. If it is less than the DC, you fail. Some tasks have varying levels of success and failure depending on how much your check is above or below the required DC. Some skill checks are opposed by the target’s skill check. When making an opposed skill check, the attempt is successful if your check result exceeds the result of the target. Some tasks require multiple successes.

Skill Tiers & Talents
Upon attaining the specific ranks of any skill a player attains a Tier Talent based on that skill.  Each tier costs points to learn Novice (1), Adept (2), and Master (3).  Each level grants specific abilities that are relavant to the specific skill. Furthermore, there are some talents that can only be acquired by learning skills in combination. And some skills which may only be learned after certain talents are acquired.