Whom has created those 'tips'? Wow, that's so cool and useful! Really good for new players to have. Well done!
Those are @balparmak's doing, with suggestions from the community and editing from other devs.
Possible exploit: Every time you build Oxford University you get a free Great Scientist. When you lose a city with Oxford University you can build in again to get another Great Scientist. Is that intended? In theory you could settle a city, buy invest and produce every building needed for Oxford University, send TR with production to speed up the process and get free Great Scientist every couple of turns.
I don't know if it's a bug, but it seems impossible to receive a city in a peace treaty, it always shows as -1 for me. Also, some units seem extremely overpowered for their era, like the Dutch Sea Beggar, it took 14 crossbow shots to take it down, and even when I had cannons it took 6.
And I don't know if this is a bug, but after ending a declaration of friendship, giving me a 10 turn cooldown to not declare war preferrably, that civ will still challenge me for having troops near the border, and I can't say yes to that without breaking that friendship oath. The same with other civs requesting help declaring war, and I would love to join them but even if I pick the 10 turn to prepare option, that civ requesting me for help will denounce me because after 10 turns anyway I'm still 1 turn short of a promise not to declare war.. So much for "let's declare war together"
And the last one is that it's impossible to assist an ally with war while sanctioned. The world congress decided to sanction me, about 5 civs were at war with me at the time, but I had 1 ally, England, and because I was sanctioned I couldn't have open borders and defend England from their territory. That seems ludicrous to me, if I am already at war with the entire world, surely I can defy their orders and walk through my ally's territory? It seems the only way to do that is if England was my vassal but because they refuse to let me do that to them even though it's us 2 vs. the world, and once an enemy took their capital they happily join THEM as a vassal and fight me, their only friend.
Please report all bugs and things that you think might be bugs on GitHub. If you're mistaken, it takes us two seconds to close the report, but if the issue is never posted there it is highly likely not to get addressed.
Not anything scientific, but I'm having huge problems with unhappiness in the new patch. No warmongering, no rapid city expansion, and building most of the required buildings, but swung down to 28% happiness in Renaissance era. Have major dissidents all around the capital playing as Carthage.
Playing on Warlord difficulty. Out of 9 civs in the game, only 2 are above 50%.
Are you playing on 2.7.3? A major bug was fixed for this.