ep2_im_in_my_elements_terrain_grabber_effect

ep2_im_in_my_elements_terrain_grabber_effect = {
	# Grab various terrain types and add them to a list.
	## Plains
	if = {
		limit = {
			location = { terrain = plains }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:plains
		}
	}
	## Sea
	else_if = {
		limit = {
			location = { terrain = sea }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:sea
		}
	}
	## Coastal_sea
	else_if = {
		limit = {
			location = { terrain = coastal_sea }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:coastal_sea
		}
	}
	## Farmlands
	else_if = {
		limit = {
			location = { terrain = farmlands }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:farmlands
		}
	}
	## Hills
	else_if = {
		limit = {
			location = { terrain = hills }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:hills
		}
	}
	## Mountains
	else_if = {
		limit = {
			location = { terrain = mountains }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:mountains
		}
	}
	## Desert
	else_if = {
		limit = {
			location = { terrain = desert }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:desert
		}
	}
	## Desert_mountains
	else_if = {
		limit = {
			location = { terrain = desert_mountains }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:desert_mountains
		}
	}
	## Oasis
	else_if = {
		limit = {
			location = { terrain = oasis }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:oasis
		}
	}
	## Jungle
	else_if = {
		limit = {
			location = { terrain = jungle }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:jungle
		}
	}
	## Forest
	else_if = {
		limit = {
			location = { terrain = forest }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:forest
		}
	}
	## Taiga
	else_if = {
		limit = {
			location = { terrain = taiga }
		}
		add_to_variable_list = {
			name = ep2_im_in_my_elements_achievement_terrain_list
			target = flag:taiga

As written in game/common/scripted_effects/00_achievement_effects.txt.