Battle Formulas

• First Hit
• Critical Hit
• Calculating Damage
• Second Hit
• Successful Escape

RPGXP's default battle system uses the following formulas.

The active battler is represented by A, where the battler who is the target for A's actions is represented by B.

First Hit

Normal attacks:

First hit rate = Hit rate of A's state

Skills:

Attack power F is 1 or greater (physical attack)

First hit rate = Skill's hit rate × hit rate of A's state ÷ 100

Attack power F is 0 (non-physical attack)

First hit rate = Skill's hit rate

Items:

First hit rate = Item's hit rate

• If A's condition is normal, the state hit rate is 100.

Critical Hit

Normal attacks:

Critical hit rate = 4 × A's dexterity ÷ B's agility

Skills:

Critical hit rate = 0

Items:

Critical hit rate = 0

Calculating Damage

Normal attacks:

Power = A's attack power - (B's physical defense ÷ 2)
Rate = 20 + A's strength
Variance = 15

• Minimum force: 0

Skills:

Skill's force is positive:

Force	=	Skill's force
	+	(A's attack power × skill's attack power F ÷ 100)
	-	(B's physical defense × skill's physical defense F ÷ 200)
	-	(B's magic defense × skill's magic defense F ÷ 200)

• Minimum force: 0

Skill's force is negative:

Force = Skill's force

Rate	=	20
	+	(A's strength × skill's strength F ÷ 100)
	+	(A's dexterity × skill's dexterity F ÷ 100)
	+	(A's agility × skill's agility F ÷ 100)
	+	(A's intelligence × skill's intelligence F ÷ 100)

Variance = Skill's variance

Items:

HP recovery amount is negative:

Force	=	- Amount of HP recovered
	-	(B's physical defense × item's physical defense F ÷ 20)
	-	(B's magic defense × item's magic defense F ÷ 20)

• Minimum force: 0

HP recovery amount is positive:

Force = - Amount of HP recovered

Rate = 20
Variance = Item's variance

• Elemental modifier: The weakest of B's effective elements corresponding to the action's element(s).
  A: 200%, B: 150%, C: 100%, D: 50%, E: 0%, F: -100%
  Reduced by half if B's armor or state has a defending (opposing) element.
  When there are more than one of the same defending elements, the damage may be halved multiple times.
• Critical modifier: Equals 2 when the damage is positive and a critical hit is made.
• Defense modifier: Equals 1/2 when the damage is positive and B is defending.

Second Hit

Damage is positive:

B's condition is normal:

Evasion = 8 × B's agility ÷ A's dexterity + B's evasion modifier

Normal attacks:

Second hit rate = 100 - evasion

Skills:

Second hit rate = 100 - (evasion × skill's evasion F ÷ 100)

Items:

Second hit rate = 100

B has "Can't Evade" state:

Second hit rate = 100

Damage is negative (recovery):

Second hit rate = 100

Successful Escape