Dwarves initially have +2 Constitution and -2 Dexterity.
Ability
Effect
Cave Dweller
Passive. You have naturally tough skin, gaining +1 Armor, and you can see with almost no light.
Earthcunning
Passive. You gain +5 to all Intelligence-based rolls when dealing with stone.
Upgrade: You gain the same benefit when dealing with metals.
Hardy
Passive. To you, all armor has 1 less of a Fortitude requirement.
Mason
Passive. You gain +3 to a Crafting skill of your choice, as well as a critical success on a roll of 19-20:
Armor/Clothes
Food/Beverages
Weapons/Tools
Upgrade: +3 to your chosen Crafting skill, as well as a critical success on a roll of 18-20.
Upgrade: You may take the higher of 2d20 rolls when using your chosen Crafting skill.
Mountaineer
Passive. You gain +1 to all d20 rolls while in a hill or mountain terrain.
Resilience
Passive. You are immune to penalties from hot climates, and poison deals 1 less damage against you each turn.