Skills

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>) ] * ( base_<skill> + modabs_<skill> )

Full Skills

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

These are the numbers shown in the player book.