20C System

A 4C System supplement to convert the system from a d% to a d20.

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Read the licence here. In effect, the work is in the public domain.

Requires the 20C System Master Table. Download a PDF or DOC.

Origins

Dice Roll Origin
1 Robot
2 Alien
3-8 Skilled human
9-12 Changed human
13-16 Mutant
17-20 Technologically enhanced

Traits

Primary Traits

Dice Roll Rank Value
1 1
2 3
3-4 6
5-8 10
9-12 20
13-16 30
17-19 40
20 50

Skills

Dice Roll Number of Skills
1-4 1
5-12 2
13-18 3
19-20 4

Powers

Dice Roll Number of Powers
1-4 2
5-12 3
13-18 4
19-20 Roll on Second Powers table instead

Second Powers

Dice Roll Number of Powers
1-18 5
19-20 Magic

Power Rank

Dice Roll Rank Value
1 1
2 3
3-4 6
5-8 10
9-12 20
13-16 30
17-19 40
20 50

Determine Power

Dice Roll Table
1-4 Roll on Powers A
5-8 Roll on Powers B
9-12 Roll on Powers C
13-16 Roll on Powers D
17-20 Roll on Powers E

Powers A

Dice Roll Power
1-2 Absorption
3-4 Alter-Ego
5-6 Animal Command
7-8 Astoundingly Wealthy
9-10 Body Armor
11-12 Burrowing
13-14 Celebrity
15-16 Chameleon
17-18 Claws
19-20 Contaminant Resistance

Powers B

Dice Roll Power
1-2 Combat Awareness
3-4 Detection
5-6 Dimension Jump
7-8 Elasticity
9-10 Elemental/Energy Control
11-12 Elemental/Energy Generation
13-14 Extra Body Parts
15-16 Fast Attack
17-18 Flight
19-20 Force Field

Powers C

Dice Roll Power
1-2 Growth/Shrinking
3-4 Headquarters
5-6 Improved Skills
7-8 Invisibility
9-10 Mind Control
11-12 Mind Shield
13-14 Nine Lives
15-16 Nullification
17-18 One-of-a-Kind Weapon
19-20 Paralyzing Touch

Powers D

Dice Roll Power
1-2 Phasing
3-4 Physical Metamorphosis
5-6 Plant Control
7-8 Protected Sense
9-10 Reflection
11-12 Regeneration
13-14 Shapeshift
15-16 Sidekick
17-18 Super Leap
19-20 Supersense

Powers E

Dice Roll Power
1-2 Superspeed
3-4 Telekinesis
5-6 Telepathy
7-8 Teleportation
9-10 Trait Boost
11-12 Trait Increase
13-14 Vehicle
15-16 Wall Crawling
17-18 Water Native
19-20 Weapon