After having made an exquisitely complex mathematical model, I am trying to make something simple that will take a back seat to role play, and not confuse new players. It is modelled after White Wolf, and in another sense after the computer language Smalltalk; I am trying to make a rule sheet that is very short and sweet.
In this model, you have four attributes: Physical, Mental, Social, and Other. Each of those attributes is rated 1 to 5: 1 is below average, 2 is normal, 3 is typical for adventurers, and 5 is highest possible. The value of these attributes is determined by you and the game master, at whatever most appropriately represents your character. The Other attribute is one you specify: could be charisma, or understanding of other people, or dexterity, or knowledge. It should be chosen in an area that tells more about your character than just Physical, Mental, and Social would have. You also have skills/abilities, each rated at between 0 and 5; skills can be anything appropriate; a suggested list is as follows:
Acrobatics/Tumbling, Acting, Animal Handling, Animal Training, Anatomy, Anthropology, Appraisal, Artistic Ability, Attack, Balance, Biology, Blacksmith, Blind Action, Bowyer/Fletcher, Brewing, Building, Carving, Carpentry, Catch, Ceremonies, Charioteering, Chemistry, Climbing, Clockwork Device Craftsmanship/Engineering, Cobbling, Cooking, Cold Tolerance, Cultures, Dancing, Dodge, Endurance, Engineering, Etiquette, Farmer, Fencing, Fire-Building, Fisher, Gambling, Gardening, Geography, Guess Actions, Haggling, Hear Noises, Heat Tolerance, Heraldry, Herbalism, Hide, History, Hunting, Illusionism, Improvisation, Incense, Janra-Ball, Jewelry, Juggling, Jumping, Jury-Rigging, Languages, Leadership, Leatherworking, Literature, Mapmaking, Massage, Mathematics, Mediation, Medicine, Mining, Move, Musical Composition, Musical Instruments, Navigation, Open Locks, Persuasion, Philosophy, Physics, Poetry, Pole Vaulting, Pottery, Public Speaking, Pyrotechnics, Reading/Writing, Read Emotion, Repair, Riding, Rope Handling, Sailing, Search, Shouting, Singing, Smell Creature, Sports, Stonemasonry, Storytelling, Strategy Games, Swimming, Symbolic Lore, Tactics, Tailoring, Technology, Technology, Theology, Throw, Tightrope Walking, Tracking, Trivia, Ventriloquism, Weather Sense, Weaving, Wilderness Survival, Withdrawing, Woodlore, Wrestling
You start with a total of 10 points to distribute between all your skills; you will earn from 1 to 3 experience points between sessions, depending on how well you role play. It takes 1 experience point to raise a skill from 0 to 1 points, 2 experience points to raise a skill from 1 to 2 points, and so on, 5 points being necessary to raise a skill from 4 to 5 points.
When you attempt to do something, the game master will assess a difficulty level from 1 (easiest) up to 10 (most difficult). You will add up the relevant attribute plus skill level (-1 if you have no skill points for that skill), and then add a die roll (divided by 2 and rounded down) to your sum, making your total; the game master will add a die roll (divided by 2 and rounded down) to the difficulty, making the difficulty total. If your total is greater than or equal to the difficulty total, you succeed at the action.
Injury is intentionally left out of this model. It is intended to be role played — if you fall when climbing the wall, the consequence is not that you're three hit points lower; the consequence is that you've got a broken leg. The point of this model is not to govern role play; it is to support it, not representing in full so much as evoking just enough chance to lend uncertainty to events in role play.