The Thief class in RO2 specializes in causing chaos and disorder for their enemies, as well as stealing items and money. Unlike their RO1 counterparts, which were a more direct attack class, the RO2 Thief is more centered around confusion-type skills designed for silent strikes and mayhem. Thief skills will revolve around causing problems with their enemies. Attacks that poison or inflict other aliments are said to be their main way of attacking, though they can also use skills to hide or disorient the enemy. Abilities such as the double attack ability from RO1 may also make a transition into RO2. The Thief is weak in long-range attacks, like the Swordsman, due to it not having any long-range abilities to counterattack with. It is significantly less able to defend itself, but balances itself out with high agility, making them a hard target. The Thief advanced classes, Assassin and Rogue, are undetermined as to being in RO2. The Assassin improved on killing moves, while Rogues move into more mayhem causing skills or even using a bow. There is good support for their existence, however, as the official description makes a note of citizens employing Thieves to use their skills.

ICON	Skill Name	Req. JLV	Skill Type	Specialty JLV	Description
	Sharpened Blades	JLV 1	Passive	No	This skill increases your Short Range Physical Accuracy.
	Short Sword mastery	JLV 1	Active	JLV 5	This skill increases Attack Power and Accuracy when using a "Short Sword".
	Venom Coating	JLV 1	Active	No	This skill lets you coat your weapon with poison.
	Back Stab	JLV 1	Active	No	This skill increases accuracy when attacking from behind.
	Lock Pick	JLV 1	Passive	No	Use this skill to open the treasure chests.
	Assassination Stance	JLV 1	Passive	No	Changes into Assassination Stance by holding your weapon upside down.
	Rapid Run	JLV 5	Passive	No	This skill lets you run faster for a certain amount of time.
	Shadow Step	JLV 5	Passive	No	This skill increases long range and short range physical evasion when used.
	Sharp Attack	JLV 5	Active	No	Increase the short-ranged physical attack 's hit rate.
	Fatal Contract	JLV 10	Passive	No	This skill increases your Physical Accuracy proportionaly to your DEX.
	Disguise	JLV 10	Passive	No	This skill lets you disguise yourself in order not to be seen by the target.
	Manhood Breaker	JLV 1	Passive	No	This skill lets you attack the vital part of the target.
	Trickery	JLV 1	Passive	No	An Attack which has a chance to ignore the enemys defence. 1 LP Required.
	Hemorrhage	JLV 5	Passive	No	This skills lets you open an existing wound to cause a heavy bleeding effect.
	Armor Smash	JLV 5	Passive	No	This skill has a chance to destroy the armor of the target.
	Tearing Wound	JLV 10	Passive	No	This skill lets you wound your enemy.
	Dormio Stab	JLV 10	Passive	No	This skill has a chance of sleeping your enemy when used from behind.
	Intelligent Avoidance	JLV 10	Passive	No	Have a certain chance to drain enemies SP in shor-ranged physical attacks.
	Sneak	JLV 10	Passive	No	Enables you to move silently. Decreases probability of being seen by the enemy.
	Intoxicating Decline	JLV 15	Passive	No	This skill lets you poison your enemy.
	Knock Out	JLV 15	Passive	No	This skill lets you knock out the target when its used from behind.
	Steel	JLV 15	Passive	No	Use this skill you can steal items from enemy targets.
	Strip Armor	JLV 15	Passive	No	This skill has a chance to strip off the armor of the target.
	Fatal Blow	JLV 20	Passive	No	This skill lets you attack the vital part of the target by using your LP.
	Stormy Cut	JLV 20	Passive	No	When used enemies in a constant radius will be stunned by you.