This is how to unlock some rare achievements in Sid Meier's Civilization VI

Create 5 Châteaux in one city with the Wine resource

civilization: France
map: true start location Europe
start era: industrial era

When you true start location Europe using France, you will be positioned with wine resources. You will be able to easily build five Châteaux with your builder. Remember that Châteaux cannot be built adjacent to each other.

This is how you place your five Châteaux

As Tamar, have every city-state in the game following the religion you founded

player: Tamar
opponents: one random leader
game difficulty: settler
start era: classical era
city-states: one
map: terra
map size: duel
victory conditions: religious victory only

Found two to three cities, research cartography technology and choose theology civic. Build holy site and oracle in one of your cities. Wait for the great prophet to spawn. Found a religion and use faith to purchase one or two missionaries. Spread your religion to all cities and force religious victory. Continue the game and search for the city-state and convert it into your founded religion.

Have 12 Policy Slots as Greece

By using Greece, you will get one extra wildcard policy slot. Start the game from industrial era, build forbidden city, potala palace and big ben. Choose either a democracy, fascism or communism government, then you will unlock the achievement.

Playing as Macedon, conquer a city containing both the Great Library and Great Lighthouse wonders

Start a game as Alexander of Macedon on settler game difficulty and medieval era with another AI player
Build a capital with a settler and settle another city on coastal area
Build the Great Library and Great Lighthouse in the city on coastal area
Give the city to the AI player, then conquer it again

Build Angkor Wat and a Wat in Angkor Wat

Create a game as Jayavarman VII of Khmer on standard map size starting renaissance era
Found the capital city and keep on producing settlers until you found a city named Angkor Wat
Found a religion and choose the second religion belief as wat
Build a holy site in Angkor Wat city and then build shrine, prasat and wat in the holy site of Angkor Wat city
Build the aqueduct district in Angkor Wat city, then build the Angkor Wat wonder in Angkor Wat city