Star Wars: Knights of the Old Republic/Skills

modifier (INT) resulting from points invested at character generation and on level up determine how many skill points a class is granted at those times:


 * Character generation


 * Level up

Characters are always granted at least four skill points at character generation, and at least one on level up:

All points do not have to be invested at character generation or level up, so they can be saved for a future level up. After becoming a Jedi, your main character's skill points on level up are determined by Jedi class, but the class skills of the earlier class are retained and those of the Jedi class are gained. Class skills cost one point to raise one rank, while cross-class skills cost two points to raise one rank:

Hence a Scoundrel who becomes a Jedi Consular has all skills as class skills. Points can be invested in class skills to maximum rank equal to level + 3, while they can only be invested in cross-class skills to maximum rank equal to [ (level + 3) / 2].

Total skill points main player characters can invest by level 20 depend on Intelligence, starting class, Jedi class and the level at which they become a Jedi:


 * Level 20 Jedi Guardian or Jedi Consular


 * Level 20 Jedi Sentinel

Computer Use
Computer Use is a class skill for a, and both  classes.

Although tasks requiring 1 computer spike never decrease in cost, tasks requiring more can have cost reduced to 0.

Aside from investing skill points or increasing Intelligence modifier, the following add bonuses to Computer Use skill rank:

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 * Organic

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 * Droid

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Demolitions
Demolitions is a class skill for a, , , and.

According to, the increases to Difficulty Class to disarm and recover mines are cumulative rather than separate:

Hostile mines must be detected by passing an check before they can be disabled or recovered. Friendly mines can be recovered without a Difficulty Class check.

Successfully disabling or recovering hostile mines requires that the sum of the character's Demolitions skill rank and a d20 roll is equal to or greater than Difficulty Class. When not in combat 20 is always rolled, so minimum skill rank (in brackets) is DC - 20.

Aside from investing skill points or increasing Intelligence modifier, the following add bonuses to Demolitions skill rank:

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 * Organic

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 * Droid

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Stealth
Stealth is only a class skill for a, and cannot be used untrained.

To use Stealth while in a party, Solo Mode must be turned on as well. Movement speed in Stealth Mode is even slower than walking, and cannot be increased with any or  stimulant, or any  power.

An Awareness check is made on first entering enemy awareness range, and every 20 seconds thereafter unless Stealth skill rank decreases (due to removing equipment with Stealth or Dexterity bonuses, a buff expiring or a debuff taking effect): however, if undetected then the next check is still 20 seconds after the previous one. The details of these checks are only recorded in when the party leader is successfully detected, which requires Awareness Breakdown > Stealth Breakdown:

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When multiple enemies are in range, each makes a separate Awareness roll against a single Stealth roll.

Standing still modifier 5 is added to both Breakdowns even while moving, but can be removed by running (you cannot run in Stealth Mode, but doing so immediately before entering it may remove this modifier from the Stealth Breakdown).

Enemies are less likely to detect you the greater the distance between you, if you are behind them in their rear arc, or they are engaged in combat. However, to guarantee you remain undetected normally requires Stealth skill rank ≥ Awareness skill rank + 9. Otherwise, the maximum chance of being detected is normally as follows:

For example, if Stealth = Awareness then the chance of detection when face-to-face is 22.5% (45/200), but with distance modifier -4 (effectively Stealth = Awareness + 4) it's only 7.5% (15/200). The table below should help illustrate how the probabilities above were derived:

Although Stealth Mode doesn't prevent computer use or droid repair, doing so cancels it in the same way as entering dialog.

Aside from investing skill points or increasing Dexterity modifier, the following add bonuses to Stealth skill rank:

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Awareness
Awareness is a class skill for all classes except an.

Awareness isn't needed to detect any enemies, so its sole purpose is detecting mines. According to, the Difficulty Class to detect a mine is as follows:

Successfully detecting hostile mines requires that the sum of the character's Awareness skill rank and a d20 roll is equal to or greater than Difficulty Class. When not in combat multiple detection attempts are rolled every second, practically ensuring a roll of 20 in short order, so minimum skill rank (in brackets) is DC - 20.

Aside from investing skill points or increasing Wisdom modifier, the following add bonuses to Awareness skill rank:

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 * Organic

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 * Droid

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Persuade
Persuade is a class skill for a and all  classes.

Although some Persuade checks always succeed and others always fail, most are divided between three categories: low, medium and high. Success rate is determined by category and the ratio between total Persuade skill rank and player level:


 * Ratio = rank / (level + 5)

Minimum ranks required to reach particular success rate thresholds are listed below:

So rank 13 ensures there is always some chance of success while rank 26 ensures 100% success rate, both regardless of category or level. However, at level 20 there is no difference in success rates between rank 13 and rank 18, or between rank 19 and 25.

Aside from investing skill points or increasing Charisma modifier, the following add bonuses to Persuade skill rank:

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Repair
Repair is a class skill for a, and both  classes.

Although reactivating a droid always costs 1 part, all other repairs can actually have cost reduced to 0. No repair costs more than 6 parts so all repairs cost 1 part at rank 20, and none at rank 36.

Minimum rank 17 is required to fully repair ../HK-47/.

Aside from investing skill points or increasing Intelligence modifier, the following add bonuses to Repair skill rank:

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Security
Security is a class skill for a and both  classes.

Aside from investing skill points or increasing Wisdom modifier, the following add bonuses to Security skill rank:

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 * Organic

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 * Droid

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Treat Injury
Treat Injury is a class skill for a, and all  classes.

Aside from investing skill points or increasing Wisdom modifier, the following add bonuses to Treat Injury skill rank:

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