19. You can expand up the build order que in your cities by clicking the bottom of the box, i think there is an arrow or a triangle there or something



20. Necrophage units will spread poison to your own units if they are attacked by your afflicted enemies, so it is advisable to select your assimilations or mercenaries that are immune.

15. Trade routes give dust and science, and are directly tied to how far the city you are trading with is (your empire automatically connects the most profitable trade routes at any moment).



16. For this reason it is worth discovering cities that are the farthest from you / the other side of the map, best way to do this is trade maps through diplomacy.



17. Consider making dedicated "scout" units. Take your fastest unit, preferably flying, give it +movement items with no armor and cheapest weapon, and send them for ruins and such



18. The morale bonus from having your units close together in combat is quite considerable and should not be ignored. Sometimes (mostly when fighting stronger units) it is better to maximize morale even if not all your units can attack.

11. There are some amazing accessories for your Heroes that you shouldn't forget to equip. For your generals: ones that increase an entire armies HP, or attack, or defense. For your governors: ones that increase food, industry, etc.



12. Heroes can basically teleport around the map. In the Academy, you can assign a hero to any army or city under your control. So, you can un-assign a governor and then assign them to lead an army that is on the edge of your empire. However, there is a latency before you can re-assign the hero again (several turns).



13. Fulfilling your race's quest line can give you some great rewards, including powerful equipment for your heroes.



14. Trade routes are really easy to build and can generate a lot of Dust and Science. You need to research Imperial Highways in the 2nd era. Then build the Right of Way improvement in your cities. This will give your empire roads (for better movement) and create trade routes automatically. If you have a peace agreement or alliance with another empire, you will even get trade routes to foreign cities.

10. Cost of luxury bonus activation depends on the numbers of the cities. Acticate luxuries before building the new city to lower the amount of luxury spent.

7. Enemy capital cities have a crown next to the name (Thanks Nergal)

8. The more cities you have the more your empire plan costs in diplomacy points. Hence if you found a second city very early you may not have enough diplomacy points to start an empire plan as it doubles the cost.

9. You need a population of at least two when you wish to build a settler (Thanks Jesterknot).

6. Use the CTRL key in combat to give a "chain" of orders like "move there then target that one".