Civilization V: Difficulties

This page should give you an overview about the bonuses, which the AI or the player receive depending on difficulty level in Civilization 5. Please note that not all values are clear yet. If you can clarify some of the values, or would like to contribute, then please post in this thread.

Player Bonuses

These are the handicaps given to players playing at the specified difficulty level. These typically only grant bonuses for difficulties below prince.

	Settler	Chieftain	Warlord	Prince	King	Emperor	Immortal	Deity
Advanced Start Points	150%	130%	110%	100%	90%	85%	80%	75%
Base Happiness	15	12	12	9	9	9	9	9
Extra Happiness Per Luxury	1	1	0	0	0	0	0	0
Unhappiness Per City	40%	60%	75%	100%	100%	100%	100%	100%
Unhappiness Per Population	40%	60%	75%	100%	100%	100%	100%	100%
Production Free Units	10	7	7	5	5	5	5	5
Production Free Units Per City	3	3	2	2	2	2	2	2
Route Cost	34%	50%	75%	100%	100%	100%	100%	100%
Unit Cost	50%	67%	85%	100%	100%	100%	100%	100%
Building Cost	50%	67%	85%	100%	100%	100%	100%	100%
Research Cost	90%	95%	100%	100%	100%	100%	100%	100%
Policy Cost	50%	67%	85%	100%	100%	100%	100%	100%
City Production Num Options Considered	10	4	3	2	2	2	2	2
Tech Num Options Considered	10	4	3	2	2	2	2	2
Policy Num Options Considered	10	4	3	2	2	2	2	2
Attitude Change	2	1	0	-1	-1	-1	-1	-1
No Tech Trade Modifier	100%	90%	80%	70%	50%	40%	30%	20%
Tech Trade Known Modifier	-100%	-50%	-25%	0%	0%	0%	0%	0%
Barb Camp Gold	50	40	30	25	25	25	25	25
Barb Spawn Mod	8	5	3	0	0	0	0	0
Barbarian Bonus	75	50	40	33	25	20	10	0
Turn Barbarians Can Enter Player Land	10000	60	20	0	0	0	0	0
Barbarian Land Target Range	2	3	4	5	5	6	7	8
Barbarian Sea Target Range	4	6	8	10	12	15	18	20

AI Bonuses

These are the mods given to all the AI when the player chooses a given difficulty level. The AI plays at chieftain difficulty level and get those bonuses as well; eg, if the player chooses deity, in addition to the 60% unhappiness listed below, the AI has 60% from playing at chieftain difficulty and those get multiplied together, resulting in 36% unhappiness from cities and population for the AI.

	Settler	Chieftain	Warlord	Prince	King	Emperor	Immortal	Deity
Free Techs					Pottery	Pottery, Animal Husbandry	Pottery, Animal Husbandry, Mining	Pottery, Animal Husbandry, Mining, The Wheel
Barbarian Bonus	45%	50%	55%	60%	60%	60%	60%	60%
Starting Settler Multiplier	0	0	0	0	0	0	0	1
Starting Defense Units	0	0	0	0	1	1	2	2
Starting Worker Units	0	0	0	0	0	0	1	2
Starting Explore Units	0	0	0	0	0	1	1	1
Declare War Probability	0%	75%	85%	100%	100%	100%	100%	100%
Work Rate Bonus	0%	0%	0%	0%	20%	50%	75%	100%
Unhappiness	100%	100%	100%	100%	90%	85%	75%	60%
Growth Rate	160%	130%	110%	100%	90%	85%	75%	60%
Train Rate	175%	130%	110%	100%	85%	80%	65%	50%
World Train Rate	160%	130%	110%	100%	100%	100%	100%	100%
Construction Rate	160%	130%	110%	100%	85%	80%	65%	50%
World Construction Rate	160%	130%	110%	100%	100%	100%	100%	100%
Create Rate	160%	130%	110%	100%	85%	80%	65%	50%
World Create Rate	160%	130%	110%	100%	100%	100%	100%	100%
Building Cost	100%	100%	100%	100%	85%	80%	65%	50%
Unit Cost	100%	100%	100%	85%	80%	75%	65%	50%
Unit Supply	0%	0%	10%	20%	30%	30%	40%	50%
Per Era Modifier	0	0	0	0	-2	-3	-4	-5
Advanced Start Points	100%	100%	100%	100%	120%	135%	150%	170%