BASIC RULES
The Cyberpunk 2020 rules are straightforward. Your characters have 9 Attributes that define who they are, and a myriad of skills that represent their learned knowledge.
To perform a test, you add Attribute + Skill + 2d6 and must overcome a difficulty set by the game master, considering the following difficulty table:
Easy: 10
Medium: 15
Difficult: 20
Very Difficult: 25
Almost Impossible: 30
Attributes range from 1 to 10, with an attribute below 3 representing some disability or severe flaw, and a 10 representing the peak of human capability. The average human falls between 5 and 6.
Skills also range from 1 to 10, with a 1 indicating minimal and amateur proficiency, and a 10 representing absolute mastery. Decent and average competence begins around 4, but as you can imagine, the benefit you get from your skills depends on your attributes.
The Dice
The dice used in skill tests are 2d6, and it's important to consider open-ended rolls and critical failures.
An open-ended roll occurs when the dice roll a natural 12 (without considering modifiers). When this happens, you roll the dice again, and subsequent rolls of 12 keep adding indefinitely.
A critical failure, or fumble, is the opposite. If you roll a 2, you roll the dice again, but this time, instead of adding, you subtract. If you roll another 12, you keep adding that negative modifier.
Note: When you critically fail with a firearm, you must make a reliability test, or the weapon jams.
Modifying Randomness
Among the 9 attributes, there is a very special one.
Luck (LK) defines your characters' good fortune and allows you to put points fully or partially into a dice roll. For example, if Silverhand (LK 8) wants to shoot (+12) at an opponent with a difficulty of 21 and wants to ensure the shot, they could dedicate 5 points of LCK to the roll, receiving a total bonus of +17, and they would still have 3 points of LK left for another roll.
Luck refreshes every scene (or sooner if the scene is very long or many days pass).
You can use Luck after making the roll and for any type of roll (Skill, stun, mortal, damage roll, etc.).
Notes for Cyberpunk 2020 veterans:
The change to 2d6 dice is motivated by my dislike for excessive randomness in results, where 10% out of every test becomes a critical failure or an open-ended roll. Using 2d6 makes the results fall more towards the middle and slightly increases the average compared to 1d10. This serves me well because the default difficulties in CP2020 are somewhat too high, which forced character attributes to be well above average to be competent, resulting in numerous NPCs with multiple attributes at 10.
It's like everyone was either Albert Einstein or Arnold Schwarzenegger.
The new dice system places an attribute of 6 and a skill of 4 with an average result of 7 with good chances of reaching a difficulty of 15. Therefore, it achieves more realistic starting values, and at the same time, makes higher difficulties harder to reach by pure chance.
As a result, character creation points have been reduced to remain in line with this "power level."