Skills

Skills are a character's secondary stats define how good the player is at various groups of tasks. Like attributes, they can be assigned points by the player for each level. Unlike attributes however, their full values are also influenced by the player's attributes.

In Arx Fatalis the player has nine different skills:

Name	Alias
Stealth
Technical	Mecanism
Intuition
Ethereal link
Object knowledge
Casting
Close combat
Projectile
Defense

The raw skill values without any modifiers are known as raw_<skill>.

Attribute-based Skill modifications

The following table lists multipliers for attributes to get the contribution to skill points.

Skill	Str	Men	Dex	Con	∑
Stealth			2		2
Technical		1	1		2
Intuition		2			2
Ethereal link		2			2
Object knowledge	0.5	1.5	0.5		2.5
Casting		2			2
Close combat	2		1		3
Projectile	1		2		3
Defense				3	3
∑	3.5	8.5	6.5	3	21.5

These factors are known as mod(<skill>, <attribute>)

Based on them we define for all skills:

base_<skill>     = raw_<skill> + ∑<attribute>[ raw_<attribute> * mod(<skill>, <attribute>) ]
fullbase_<skill> = raw_<skill> + ∑<attribute>[ full_<attribute> * mod(<skill>, <attribute>) ]

Arx Fatalis 1.21 and Arx Libertatis 1.0.2 and earlier have a bug causing the fullbase_<skill> values for the Object knowledge and Projectile skills to be calculated as (ie: not including attribute modifiers from items and spells):

fullbase_object_knowledge = base_object_knowledge
fullbase_projectile       = base_projectile

This is fixed in Arx Libertatis 1.0.3.

Absolute Item-based Skill modifications

Equipped items can add or remove skill points:

modabs_<skill> = ∑<item>[ modabs(<item>, <skill>) ]

Relative Item-based Skill modifications

Alternatively, equipped items can also add or remove a percentage of the skill points:

modrel(<item>, <skill>) = modpercent(<item>, <skill>) / 100
modrel_<skill> = ∑<item>[ modrel(<item>, <skill>) ] * ( fullbase_<skill> + modabs_<skill> )

Full Skills

full_<skill> = fullbase_<skill> + modabs_<skill> + modrel_<skill> + cheats

These are the numbers shown in the player book.