tech_ancient_jump_calculations = { cost = 0 area = society tier = 4 category = { archaeostudies } is_rare = yes weight_modifier = { modifier = { factor = 0 } } ai_weight = { factor = 0 } } tech_archaeo_jump_drive = { cost = 3000 area = society tier = 5 category = { archaeostudies } is_rare = yes is_dangerous = yes is_reverse_engineerable = no prerequisites = { tech_ancient_jump_calculations tech_jump_drive_1 } }