Here is my thread for my house rules on all things skill, knowledge areas, training and inventing point related.    I don't really have an order to this madness, so I will post as I think of them.

Some skills that have been used in my game.

Computers:  I  Gives a basic understanding of computers.

Computer Programing: I must also have computer skills.  Gives a more indepth knowledge of computers and how to program them and make new programs.

Dodge: Gives a flat -2 to be hit when aware of an attack.

Martial Arts:  Gives a flat +2 to hit with unarmed HTH attacks.

Tumbling: Allows a person to "roll" with the damage when hit.  If you do not have this skill, you can not roll with a punch!

Weapon Specialist:  gives a flat +2 to hit with any one weapon picked.

Medical: I gives a basic understanding of medicine and how to treat minor injuries and illness.

Surgery: Here are the rules

Languages: I  gives an understanding of a new language.

Contacts:  C  Gives the character a person that they can go to for information.  Each contact would be good for one type of information.  For instance,  Batman has criminal contacts that he goes to when he needs information about Gotham's Underworld.   Same with Moon Knight.   Batman goes to other people, like Dr Faulkner in STAR labs for science information.   

Streetwise:  C  Gives the player relevant information about life in the streets and how the people interact in "less polite" surroundings.

Retainer: C  The player has a butler or private doctor that they can go to for help.   This is like Dr Strange with Wong, or Batman with Alfred.  Remember, this is not a power, this is just strong relationship that the player has created with the retainer due to a shared background, obligation, or family.

(Insert City Here): I  The character knows all about a particular city.   When they pick up this skill, they learn the heart beat of a city.  They learn the secret places,  the rhythms of a city.  Batman knows every knook and crany of Gotham.  He has spent an inventing point to learn the whole layout of his city perhaps better than anyone.  He knows the sewars, the alleys, the best places to hide, and all the best, and fastest, routes.

To invent something in my game, one has to have the nessessary knowledge and skills to do so.   If all one has is accounting and sports, you are not going to build a time machine!

To build a light sabre, one would have to have the following knowledge areas and skills; physics, engineering, mathematics, electronics and anything else the GM may declare.  Then, and only then can one begin to invent a light sabre!   And that assumes you have well equipped place to work.  One can not make a light sabre if one is tuck on a dessert island.  And even if you have everything it will still be very costly.

Mechanics: I  This skill gives a character the ability to fix something that is broken.   Id20 gives you the percentage of a machine that can be fixed in a 24 hour period.  Of course parts and cost may interfere with that.

Ex:  Your intellegence is 12.  You roll a four on a die 20.  12-4=8.  You can fix 80% of damage in a day provided you have all the materials and money needed.   This gives you the skill to repair mundane stuff.  Anything exotic may require more skills.

Wit:  C  +2  Due to your innate ablity to be funny.

Seduction: C +2  When trying to seduce  someone.

Charm:  C +2 to your charisma due to your skill at conversation.

Bumping again for some reference