hoi3.com - Hearts of iron 3

Following is a quote from the developers:

Here's parts of some files for modders to drool over..

example of an historical event..

########################
# Anschluss of Austria #
########################
# Austria - Reaction event
country_event = {

	id = 1101
	
	is_triggered_only = yes
	
	title = "EVTNAME1101"
	desc = "EVTDESC1101"
	picture = "anchsluss"

	option = {
		name = "EVTOPTA1101"			# Become a part of the Greater Reich
		ai_chance = { factor = 100 }
		GER = { country_event = 1102 }
	}
	option = {
		name = "EVTOPTB1101"			# Join the Axis
		join_faction = axis
		military_access = GER
		dissent = 10
		relation = { who = ITA value = 15 }
		head_of_state = 23050
		head_of_government = 23060
		foreign_minister = 23071
		armament_minister = 23085
		minister_of_security = 11189
		minister_of_intelligence = 23096
		chief_of_staff = 23106
		chief_of_army = 23117
		chief_of_navy = 23125
		chief_of_air = 23010
		GER = { country_event = 1103 }
	}
	option = {
		name = "EVTOPTC1101"			# Austria shall remain independent
		dissent = 40
		relation = { who = GER value = -125 }
		relation = { who = ITA value = 15 }
		relation = { who = ENG value = 5 }
		relation = { who = FRA value = 5 }
		war = GER
		GER = { country_event = 1104 }
	}
}

 Here is how a unit looks like...

anti_air_brigade = {
	type = land
	sprite = Infantry

	#Size Definitions
	max_strength = 10
	default_organisation = 30
	default_morale = 0.30

	#Building Costs
	build_cost_ic = 2.33
	build_cost_manpower = 1.67
	build_time = 95

	#Misc Abilities
	maximum_speed = 4.00
	transport_weight = 5.00
	supply_consumption = 0.67
	fuel_consumption = 0.00
	radio_strength = 1

	#Defensive Abilities
	defensiveness = 3.67
	toughness = 1.33
	softness = 1.00
	air_defence = 5.00

	#Offensive Abilities
	suppression = 0.00
	soft_attack = 0.67
	hard_attack = 1.00
	air_attack = 2.00

   	amphibious =    { attack = -0.40 }
    	river =         { attack = -0.20 }
   	marsh = 	{ attack = -0.10 }
	jungle = 	{ attack = -0.20 }
	forest = 	{ attack = -0.10 }
	woods = 	{ attack = -0.05 }
	
	combat_width = 0
	
	completion_size = 0.2
	on_completion = artillery_practical
	priority = 3

}

 Example of a building...

# Do not change tags in here without changing every other reference to them.
# If adding new buildings, make sure they are uniquely named.
#
# Order in here matters for selection priority if icons are overlapping,
# so leave bases on top

# 
# cost = x #==> cost in ic to build (subject to other modifiers)
# time = x #==> number of day to build.
#

air_base = {
	on_completion = construction_practical
	air_capacity = 1
	capital = yes
	onmap = yes
	cost = 2
	time = 180
	max_level = 10
	visibility = yes
}

and two screenshots as well.