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Citadel

Tier 4 engineering technology · Voidcraft
EngineeringTier 4Voidcraft

Citadel is a tier 4 engineering technology (Voidcraft) in Stellaris 4.5.2. Its base cost is 10,000 research. It needs Star Fortress. It unlocks Citadel and Orbital Ring Tier 3 and leads to Advanced Space Habitation. Console: research_technology tech_starbase_5.

CitadelVoidcraft· tier 410,000
Base cost
10,000
Area
Engineering
Tier
4
Draw weight
40
Path from start
5 techs, 17,500 research
ID
tech_starbase_5

What Citadel does

Modifiers as the game prints them, from the technology's modifier block; then the unlock lines its research card shows.

  • Unlocks Starbase Upgrade: Citadel
    Citadel Upgrading the Star Fortress, Citadels are the largest and most heavily fortified type of Starbase and can house four Buildings and a full complement of six Modules.

What Citadel unlocks

Everything in the game files that lists this technology as a prerequisite; “condition” marks objects that check for it in their conditions instead.

How to get Citadel

Research in Stellaris is drawn: each area offers 3 cards at a time, weighted by each technology's draw weight (here 40) and its weight modifiers. Tier 4 opens after 6 tier 3 technologies of the same area.

The whole research path: 5 technologies, 17,500 base research with this one
  1. Offworld Constructionstarting tech
  2. Starbase Constructionstarting tech
  3. Starportstarting tech
  4. Starhold2,500 · tier 2
  5. Star Fortress5,000 · tier 3
Conditions (potential)
  • Not: Nomadic empire

What Citadel leads to

Technologies that list it as a prerequisite.

In the game

Plans for an immense battlestation capable of holding its own against several strike fleets are now being drawn up. If realized, these citadels will become monuments to greatness as much as system hubs.

Console command

Typed in the game's console (the ~ key); achievements are off for that game.

research_technology tech_starbase_5
Draw weight script, as in common/technology/00_eng_tech.txt
modifier = {
	factor = 0.1
	NOT = {
		years_passed > 70
	}
}
modifier = {
	factor = 10
	any_neighbor_country = {
		has_technology = tech_starbase_5
	}
}
modifier = {
	factor = 2
	years_passed > 90
}
modifier = {
	factor = 3
	years_passed > 95
}
modifier = {
	factor = 4
	years_passed > 100
}
modifier = {
	factor = 5
	count_starbase_sizes = {
		starbase_size = starbase_starfortress
		count >= 3
	}
}
modifier = {
	factor = 1.25
	has_tradition = tr_unyielding_adopt
}
modifier = {
	factor = 5
	has_modifier = agenda_impenetrable_border_finish
}

Citadel: questions

How do I get Citadel in Stellaris?

Research Star Fortress first (5 technologies in the whole chain); then Citadel can be drawn as one of the 3 engineering research options. It also has conditions (see Requirements on this page).

What does Citadel do?

It unlocks Citadel (ship size) and Orbital Ring Tier 3 (ship size). It leads to Advanced Space Habitation.

What is the ID of Citadel?

The technology's ID is tech_starbase_5. To get it with the console: research_technology tech_starbase_5 (Stellaris 4.5.2).

How much does Citadel cost?

10,000 engineering research before modifiers. In game the cost grows with empire size (+0.2% per point above the base, common/defines) and the galaxy's tech cost setting.

Source: common/technology/00_eng_tech.txt and localisation/english, Stellaris Cygnus v4.5.2 (9776). Base numbers before empire-size and difficulty modifiers.

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