Many people say:

Wicked city ★★★★

Very large encounter map, including garrisonable buildings, science and technology buildings, etc. )

The difficulty of Yuri's Nest ★★★★★★★★

This is a very good night map. Four entry points are easy to defend but difficult to attack. There are many cliffs and ambush sniper points with special lighting effects. There are also technical drilling wells, two technical airports, several machine shops, a secret laboratory and a civilian hospital that can be occupied. You can also find Yuri's signature in the middle and lower part of the map. Isn't it interesting? Go and see what it looks like! ^_^)