As for unique buildings and getting more military tech, they do not provide much benefits.
Note: Tiers, weights, and what modifiers affecting it are hidden parameters.
In addition, they are also unlocked as technology options rather than as finished schemes ready for construction.
This guide essentially provides an overview of all available Ethics, Traits, and Governments in Stellaris.All of these new technologies have mega-engineering as their prerequisite.In addition to this, you will also get extra leader capacity.Governments Indirect Democracy / Democratic Utopia Situational Effect : 1 and 2 Leader Starting Skill Level and -10/-20 Leader Recruiting Cost This is good for leader-focused builds and goes hand in hand with leader traits especially lifespan ones.Repugnant Strong -1 Point Effect : -1 Other Species Happiness per Charismatic POPs This is for those who do not want to play with foreign happiness and can endure a little diplomacy setback.Sedentary Strong -1 Point This is useful for those whose empires policies do not allow them to migrate or resettle.Despotic Empire / Star Empire Strong / Situational Effect : 10 and 20 Slave Mineral and Food Tile Yield, -15 and 30 Building Cost This is good for those who use slavery or are looking for building cooldown reduction.This may be further modified by an empire's composition (ethics, civics, and etc.) and its current state (scientist's traits, past tech, and etc.).Furthermore, you need to try and have more empire tech and few army techs, even if you plan to go to war.There is no point of it without slaves.They appear below the regular alternatives and are distinguished from system w lotto jak grać them by a golden border surrounding the tech card's bezel.Extremely Adaptive 5 Points This is good for colonizing different worlds and recommended for happiness-based builds.Natural Engineers Strong 1 Point, this can be considered as specialized version of Intelligent at a lower cost.Example Let's assume the game draws a card hand of 3 techs: Armored Torpedoes, Autocannons, and Orillium Extraction.
Aside from its home system, it owns 2 other systems and 1 colony.
Note: A research area without an acting lead scientist receives a penalty to research speed.
Industrious Weak 2 Points.Moral Democracy / Irenic Democracy Situational / Strong Effect : 10 and 20 Happiness While this can be good for happiness-based builds, do note that there are many global happiness resources which will ensure that you do not reach a happiness overkill.Venerable Situational 4 Points Effect : 120 Year Leader Lifespan This is again an overkill despite the insane bonus.Lastly, do note that you need to be at war and not actually fight in order to get the happiness bonus.It is like wasting a point if you are planning on colonizing low habitability worlds.Nomadic Situational 1 Point This is ideal for resettlement mechanic and useful for larger empires trying to populate new worlds.Science Nexus and Sentry Array are Physics.
The following table details the all-encompassing research speed modifiers while the one below lists limited scope modifiers: Population Governance Planet Technology 100 "Covenant: End of the Cycle" modifier 20 Chosen One "Boon of the Shroud" modifier 15 Curator "Covenant: Whisperers in the Void" modifier "Extra.
Later down the road, you will need less Power Plants which essentially means using planet tiles for buildings such as labs.
Moreover, a lot of your empires energy production will be tile-based which will allow you to get 10 energy income for your empire which basically means less power plants.