The game would feature a range of proficiencies, skill sets that party members improve at through practise like in MMORPG's and the Elder Scroll series.Through performing certain actions, an actor builds up an XP gauge for a corresponding proficiency that levels up and can unlock new abilities in its own skill tree.
Also, the combinations of different base stats influence how fast or slow the actor can accumulate XP for certain skills. The higher some of an actors stats are, the faster he/she can level up related proficiencies.
Some examples I'd like to list would include...
- Specific Weapon Types (i.e. Swords, Bows, etc.): Levelling up a proficiency in a certain weapon type will improve the actor's accuracy, damage and critical hit rate with it as well as unlock new related abilities and perks. The XP gain rate for melee weapons would be determined by Strength and Dexterity whereas XP gained for ranged weapons would be influenced by Perception and Dexterity.
- Stealth: The ability to sneak past NPC's or pickpocket. Levelling up this skill would boost the effects of certain equipment suited for thieves (like lowering the actor's target rate), increase the probability of stealing rare items from enemies, etc. XP Gain for this skillset would be influenced by Dexterity, Perception, Agility, and Intellect.
- Engineering: Higher levels would unlock the ability to create, maintain and fix more advanced technological equipment and items with increased durability, and/or spot and disarm booby traps. XP Gain for this skillset would be influenced by Dexterity, Intellect, and Perception.
- Medicine: Higher levels would allow the creation of more advanced medical items as well as better resistances to status ailments. XP gain could be influenced by Endurance and Intellect.