Game System
Wicked Things utilizes the Unisystem. (Click HERE to download the corebook.) Thankfully all of this is coded into the game you just need to tell the system what attributes, skills and/or circumstance modifiers to include. Roll Commands
A modifier (+#) or penalty (#) can be added to any stat roll using +#. Example: +Roll Dexterity+Brawling+2 Roll ResultsEvery time you make a roll on the game using one of the first two commands listed above you, and everyone in your location, will see the results listed as: '<Game> Name rolls Attribute+Skill. Result: # (Success Level)'. The # listed is the actual result of the dice roll plus any attributes, skills, modifiers and/or penalties included in the roll. This is known as the Result. The Success Level is listed in parenthesis after the result as determined by the Outcome Table. Different tasks refer to either the Result or Success Level, this will be noted in any task specific files. When completing opposed tasks (rolling against another character or NPC) compare the Result  the person with the highest number wins.
Dice NotationsD10, D8, D6 and D4 mean a tensided die, an eightsided die, a sixsided die and a foursided die, respectively. When a number appears before the notation, that number of such dice should be rolled, and their results should be added together.
Multipliers are expressed after the dice notation.
A number in parentheses after, or in the middle of, the notation is the average roll. This number is provided for those that want to avoid dice rolling and just get the result. So the notation D6 x 4(12) means that players who want to skip rolling just use the value 12. Some notations cannot provide a set number because their result depends on a variable factor.
Refering back to John and Tom's fist fight above...

Other System RollsInitiative: Who goes first? System TablesTable 1.1: Base Modifiers Equipment TablesTable 2.1: Close Combat Weapons 