ok so I conquered an ennemy city 93% unrest... really??

Over time, the recently conquered unrest penalty gradually decreases. 

1. Connect it to your influence.

2. Rush the unrest reducing buildings.

3. Wait for the conquest penalty to drop.

4. Reduce your taxes.

5. Raze some useless cities.

6. Cast unrest reducing spells.

7. Station a champion, especially a Commander.

no option to raze either from what i can tell.

you may have to wait a few turns. Although i believe razing is bugged in the beta, you can insta-raze cities.

Insta-raze is in the patch notes for LH, it's intended.

Anyways, to address the unrest issues, Dsraider pretty much has the right of it. Rushing a Bell Tower + casting Bless City + moving in your Administrator champ that sticks behind on conquests for this situation will help a great deal. Oh, and having a couple Fortresses with Prisons/Obsidian Thrones helps too.

realistically, a 4x game is about "snowballing" - the more stuff you have the quicker and easier it gets to grab even more stuff. so a decent 4x game needs some mechanics to slow down powers that are in the process of steamrolling the opposition. i always found the temporary unrest of conquered cities a good mechanic. it slows down the aggressor (at least a bit) and it presents you a choice - keep the city and accept that it will suck for the next 50 turns, or raze it and possibly resettle the spot with a new city that starts from scratch.

if there was no penalty, it would be too easy to steamroll right from the beginning - build a few starting units, crush your neighbor and immediately start building even more units from his cities to crush the next guy etc etc.

I can 1-UP the OP.  I conquered a city and it had 100% unrest.  Nothing can be produced.  They're just trying to slow down us warmongers.

very well explained! Plus it really makes sense for a conquered city to be that resistant. There are plentoff stories about brave resisters. 

by the way, it would be nice to create a fraction/sovereign ability that reduced unrest penalty faster. Something like "Assimilation". In a high-fantasy game it would be typical ability for humans.

Another dynamic that could be fun is to have a chance to spawn rebel armies that try to free the city. 

MONEY!

Thanks for the answers.

It does make sense when it's put that way. It sure slowed me down.

Thanks