I'm assuming here that all PCs are fighters and/or sorcerers. If the specialist class from LotFP is in use, I probably wouldn't use these house rules on top of that.
Skills and the Races of Carcosa
When it comes to Player Characters, each race of humans on Carcosa specializes in three skills. At first level, a PC will have 2 ranks in each specialized skill and 1 rank in all other skills (with the exception of Psionics - see below). Every time a PC gains a new experience level, they may choose one of their specialized skills to increase by one rank.
The skill list (mostly taken from HERE) consists of the following:
- Athletics (combines Climbing, Open Doors, and Swimming into one skill)
- Medicine (see the LotFP Playtest Document 0.1 or Eldritch Cock)
- Psionics (see below)
- Stealth (includes the functions of Sleight of Hand)
- Red - Bushcraft, Languages, Medicine
- Orange - Athletics, Languages, Tinkering
- Yellow - Architecture, Languages, Psionics
- Green - Athletics, Bushcraft, Stealth
- Blue - Architecture, Bushcraft, Medicine
- Purple - Bushcraft, Psionics, Tinkering
- Brown - Architecture, Stealth, Tinkering
- Black - Architecture, Athletics, Stealth
- White - Architecture, Athletics, Medicine
- Bone - Languages, Medicine, Stealth
- Ulfire - Medicine, Psionics, Tinkering
- Jale - Languages, Psionics, Tinkering
- Dolm - Athletics, Psionics, Stealth
- Earthling or Space Alien - Architecture, Medicine, Tinkering
If the skill specializations listed above seem too rigid or restrictive, the referee could allow each player to pick one of their PC's skill specializations to replace with a different skill. The replacement skill could be determined randomly or chosen by the player. This way, every race would have some chance of having psionic powers, for example.
NPCs need not universally follow the same skill specializations as PCs, although it may be interesting to further differentiate the various human cultures on Carcosa by having them be renowned for or stereotypically associated with specific skills.
Special thanks to Jessica Stewart for helping me write this post.