-Strength (STR) increases the maximum power of melee attacks. It increases the maximum damage for warriors. Warriors need at least 35 AP in STR to make their first job advancement.
-Dexterity (DEX) increases the accuracy, avoidability and minimum damage of all attacks, except magic. It increases the maximum damage for bowmen. Bowmen and thieves need at least 25 AP in DEX to make their first job advancement.
-Intelligence (INT) increases the magic attack and magic defense stats. INT affects a magician greatly as their damage and accuracy is based on it, although INT isn't too useful for other classes. Magicians need at least 20 AP in INT to make their first job advancement.
-Luck (LUK) increases the avoidability and accuracy of all characters, and decreases the EXP lost when a character dies. It increases the maximum damage of thieves.
Exact effects of each stat depend on the player's job and class.
It is recommended by most game guides that the various classes should only increase class-specific abilities. Warriors should only increase STR and DEX, (with STR being the main priority) as they only use physical attacks. Bowmen should also raise STR and DEX, (with DEX being the main priority) . Magicians should increase only INT and LUK (with INT being the main priority). Thieves are advised to increase LUK and DEX (with LUK being the main priority), although STR dagger thieves (thieves who use a dagger that requires points in STR) also need some points in STR.