National technology

Usefulness:7/10. Early on, it's not that useful since most cities are open. But as the game progresses, it's usefulness increases



Order of upgrading: Depends on the nation. If close to enemies, upgrade second. If somewhat far from enemy cities and can afford more to upgrade some technologies before you reach a major city, then don't bother until you upgrade other technologies that improve supply flow. If low culture at start, don't bother upgrading until later.



Cost efficiency: 24 culture to increase damage against garrisoned units. Not cost efficient if you're a nation that starts around 30 culture. 3/5

Usefulness: 6/10 .Is good, but not immediately. You need to have mint, which is a building you can construct in a Commercial center. I haven't saw a commercial center with a pre-upgraded mint or library(unless it's a captured city). Useful only if you star building mints en masse. Will be useful middle game or if you upgrade most your commercial centers into mints.

Order of upgrading: Since most nations have this, upgrade this first if you don't have any better technology to upgrade.  Like poetry and metallurgy, upgrade to gain more research points.

Cost efficiency:27 culture for a potentially really good Technology. Cost efficient if you captured a lot of cities with mints, or if you built mints in your commercial center. 3/5

Usefulness:5/10. Like Irrigation, it won't be useful immediately. You need to upgrade quarries before it becomes useful.



Order of upgrading: Industry isn't that important compared to culture or economy. Upgrade after you upgraded Irrigation and Poetry.



Cost efficiency: 25 culture for +5 industry per quarry. Like Poetry and Irrigation, returns are made in the middle game. 3/5

Usefulness: 5/10.Similar to Irrigation and Metallurgy. Although culture is really needed early game, and it's usefulness diminishes as the game progresses as the number of culture you have reaches high numbers.

Order of upgrading: Upgrade if there aren't any useful technologies like Advanced Battering Ram first.

Cost efficiency: 2 culture per library for 23 culture. Similar situation with Irrigation and Metallurgy 4/5

*I am not sure exactly what Drainage system does. Based on how it was worded, it seems to lower the effects of aggressive nature by increasing the penalty on decreasing industrial output. I thought it was lowering the effects of aggressive nature on Industrial output, but it says TO industrial output rather than OF industrial output. But to based on which is most likely to be true, i'd think it's more reasonable to believe that it decreases the effect of aggressive nature on industry production. If i'm wrong please let me know.

Usefulness : 6/10 .An early game technology, but for what it's worth, it's extremely useful,especially for 1 star and 2 star nations. Having industry not affected that much when you are of aggressive nature makes it so you can bribe more.

Order of upgrading: Should be a priority for 1 star and 2 star nations

Cost efficiency: 25 culture to reduce effects on industry output. Worth it's cost. Would be more worth it if industry was more important. 3/5

Usefulness:10/10. the most useful National technology that can be unlocked researched immediately along with Advanced Battering Ram

Order of upgrading: Number 1 priority, unless Advanced battering ram is available, then the number 2 priority

Cost efficiency: 41 culture for gaining culture based on the number of cities you have multiplied by 2. After around 3-5 turns, you should have gained back the amount you used to research it depending on the number of cities you have. 5/5

Usefulness:9/10. 2nd after Academy and Battering Ram



Order of upgrading: Upgrade after Academy, or the first one if you need economy more than culture at the moment. Ignore if you can't afford to spend 45 culture



Cost efficiency:45 culture. Pretty expensive. It's a worth while investment, but it's not cost efficient for some 2 star and 1 star nations. It's gonna be really worth it later on, but sometimes you can't afford to waste 45 culture just for 30 extra economy per turn. 2/5

Usefulness:8/10. Great for 1 star and 2 star countries who are in aggressive or Crazy nature, or close to it. Having +20 population to reduce aggressive nature to defensive or Crazy nature to aggressive will help you a lot when it comes to income



Order of upgrading: Upgrade after Trade route, Advanced battering ram and Academy



Cost efficiency: 27 culture for +20 population. Since it can lower your belligerence level, thus increasing income, it's cost efficient. 3/5

Usefulness: 9/10. Decreasing the amount of rounds for researching will help you gain an initiative much earlier in the game, which will in turn lead to a faster conquest.



Order of upgrading: Upgrade after you get 4 research points. It makes it so you can upgrade the next set of technology faster

Cost efficiency: 45 turns to reduce researching rounds by 1 turn. 4/5

Usefulness: 10/10. Capturing cities is the name of the game in GCR. Although there are missions where killing units is the important thing to do, it doesn't hurt it's usefulness. In conquest, this is , aside from Academy, the most important National technology for the first set of technology



Order of Upgrading: First



Cost efficiency:27 culture for the ability to do more damage to cities. 5/5

Usefulness: 7/10. Lowering the effects of being aggressive on economic output is useful early game



Order of upgrading: Upgrade Asap if you lack other options like Imperial guard.



Cost efficiency:27 culture to reduce negative effects of being aggressive to economic output. 4/5

Usefulness: 4/10. Would have been great if it worked on land. As it stands, it only works for the navy

Order of upgrading: Don't bother to upgrade. Only upgrade if you need the points to get to the next Technology set to upgrade

Cost efficiency: 33 culture for 10% damage as a navy. Really great skill if only naval battles are the norm in the game. 2/5