Here is a list of skills that have been used in the Vegas game.
animal lore: helps the character identify animals
armor: how comfortable and mobile a character is while using armor.
assault rifles: combat skill
astronomy
bicycling
bow: combat skill
cannon: combat skill
car: driving skill
chemistry
climbing
cybernetics
dancing
demolitions
electronics
fire arm repair
first aid: adds mortal points to injured people and stops them from bleeding to death
gambling
geology
handguns: combat skill
herb lore
hunting
jumping
knife: combat skill
land navigation
martial arts: combat skill
mechanic
medicine: adds mortal points to injured people and adds to the chances of curing all sorts of ailments
metallurgy
monster lore: adds to the characters ability to know something about unusual creatues
motorcycle: driving skill
pick locks
pick pockets
pilot
roller blading
scuba diving
singing
skydiving
sniper: adds damage to a rifle attack in which the character takes extra time to aim and gives a percentage chance of "one shot, one kill"
spell resistance: adds to the characters resistance to one type of spell
staff: combat skill
stealth
survival
swimming
sword: combat skill
taunt
throwing knife: combat skill
tracking
trident: combat skill
tumbling
weather sense
weight lifting: increases the chance that a character's strength will go up when the character goes up a level