Sid Meier's Civilization V: Gods & Kings/The Celts

The Celtic civilization was a very wide and diverse society spread out across Europe as tribes, before ultimately being conquered by the Roman Empire. The Celts are led by Boudicca, the fearsome Queen of the Iceni Tribe that led the Celts during the uprising against the Roman Empire. The Celts are a civilization focused on getting a quick religion, with a Unique Ability that almost guarantees getting the first Pantheon. They have a Unique Unit that benefits an aggressive strategy, though their Unique Building isn't as good as it can be.

Unique Ability

 * Druidic Lore - +1 Faith per City with an adjacent unimproved Forest tile. +2 Faith per City with 3 or more adjacent unimproved tiles.

Ceilidh Hall

 * Cost: 200 Production
 * Maintenance: 2 Gold per turn
 * +4 Culture, +3 Happiness, 1 Artist Specialist slot
 * Prerequisites: Acoustics technology, Amphitheater
 * Replaces Opera House
 * Bonus +3 Happiness

Pictish Warrior

 * Cost: 56 Production / 112 Faith
 * Type: Melee
 * Combat Strength: 11
 * Movement Points: 2
 * Prerequisites: Bronze Working technology
 * Obsolete with: Civil Service technology
 * Upgrades into: Pikeman
 * Replaces Spearman
 * 20% combat bonus outside of friendly territory, no movement cost to pillage, earns 50% of target's Combat Strength as Faith after killing a unit