Originally Posted by GothicGothicness 
haha, well basically Eschalon kind a used something which have been in several games before including wizardry
It is harder to implement in a party based game though, because if one person has cartohrapgy why would anyone else want to get this skill???
Why is this a problem? In real life it is also sufficient, if one in the group knows the way.
Also, it is sufficient, if one person is a good diplomat, can open locked doors chests etc.
So this is a normal situation for most skills. It is sufficient, if one in the group has it.
There are, ofcourse, other skills, which are necessary for the whole group: Everybody needs good sneaking skills, if the whole group wantsto sneak.
But why is it a problem that there are skills of both kinds?