Call of Cthulhu 7th Edition Cheat Sheet

Core Mechanics

Difficulty Levels

	Worst	Bad Roll	Good or Hard Roll	Very Good or Hard Roll	Extermely Good or Hard Roll	Best	Keeper's Rulebook
Roll Type	Fumble	Fail	Regular Success	Hard Success	Extreme Success	Critical	Pgs. 83 - 84, 89
Difficulty Definition	-	-	Challenge a competent person.	Challenge a profession.	Challenge an Expert.	-	Pgs. 82 -83
Dificulty Level	-	-	Regular Difficulty	Hard Difficulty	Extreme Difficulty	-	Pgs. 82 -83
Roll Value	➀	More than Skill or Score	Less than Skill or Score	Less than ½ Skill or Score	Less than ⅕ Skill or Score	01	Pg. 91

➀ If the skill is greater than 50%, a fumble occurs only on a roll of 100. Otherwise, a fumble occurs on a roll of 96-100.

• Regular: Roll equal to or under the skill/characteristic.
• Hard: Roll equal to or under half the skill/characteristic.
• Extreme: Roll equal to or under one-fifth the skill/characteristic.

Idea Roll

• Roll vs Int

Bonus and Penalty Dice

• Bonus Die: Roll an extra tens die; take the lower result.
• Penalty Die: Roll an extra tens die; take the higher result.

Push the Roll

• A failed roll may be retried if the Keeper allows it, but failure can result in worse consequences.

Opposed Rolls

• The highest level of success wins (Extreme > Hard > Regular > Fail).
• Ties favor the defender.

Combat

Sequence

1. Determine Order: Highest DEX goes first.
2. Attack Options:
   1. Dodge: Avoid damage (no counterattack).
   2. Fight Back: Counterattack if successful.
   3. Maneuver: Inflict a specific effect (e.g., disarm).

Outnumbered Penalty

• If a character dodges or fights back multiple times in a round, each successive roll incurs a penalty die.

Sanity

• Sanity Check: Roll against current SAN.
• Loss Examples:
  • Minor shock (1/1D4 SAN loss).
  • Horrifying event (1/1D10 SAN loss).
• Bouts of Madness:
  • Immediate effects (e.g., fainting, fleeing).
  • Long-term effects determined by the Keeper.

Damage and Healing

• Hit Points:
  • Major wound if damage >= half max HP.
  • Death if HP reaches zero and CON roll fails.
• Healing:
  • First Aid: Restores 1D4 HP.
  • Medicine: Restores 1D4+1 HP.

Chases

• Compare MOV values:
  • Higher MOV = Escape advantage.
• Actions:
  • Move 3+ locations: Requires 1 action.
  • Hurdles: Roll appropriate skill to overcome.

Firearms

• Base Ranges:
  • Regular range: No modifier.
  • Long range: +1 difficulty level.
• Modifiers:
  • Point-blank: +1 bonus die.
  • Aiming for 1 round: +1 bonus die.
  • Moving target: +1 penalty die.

Reference Tables

Armor Values

• Heavy Leather Jacket: 1 point.
• Kevlar Vest: 5 points.
• Military Body Armor: 12 points.

Insanity Effects

1. Phobias: Character must avoid specific triggers.
2. Manias: Character becomes obsessed with an idea or behavior.
3. Delusions: Distorted perception of reality.

Damage Levels

• Minor: Can survive without medical help.
• Major: Requires immediate treatment.
• Deadly: Fatal without intervention.

Quick Tips

• Use skills creatively to overcome obstacles.
• Keep an eye on SAN; long-term effects can derail plans.
• Communication and roleplay add depth to investigations.

Character Creation

Determine Characteristics:

• Roll 3D6 for STR, CON, POW, DEX, and APP.
• Roll 2D6+6 for INT and SIZ.
• Roll 3D6+3 for EDU.

Calculate Derived Stats:

• Luck: Roll 3D6 x 5.
• HP: (CON + SIZ) / 10.
• Sanity: POW x 5.
• Move: Adjusted by STR, DEX, and SIZ.

Choose Occupation:

• Select a profession (e.g., Detective, Antiquarian).
• Allocate skill points: EDU x 4.

Choose Personal Interests:

• Allocate additional points: INT x 2.

Flesh Out the Character:

• Write a backstory.
• Add connections, traits, and quirks.

Starting Equipment:

• Based on occupation and Keeper guidance.