To unlock doors and chests in Baldur's Gate II: Shadows of Amn, you will need characters with high enough lockpicking skills or use spells like Knock. Approach the locked object, right-click on it, select the character with lockpicking skill, and click on the lock.
Unlocking Doors
To unlock doors in Baldur's Gate II: Shadows of Amn, you will need a character with the Open Locks skill. This skill can be found in the thief skill tree and is typically performed by rogues or characters with thief abilities. When you encounter a locked door, you can click on the character with the Open Locks skill and then click on the locked door to attempt to pick the lock. The success of unlocking the door will depend on the character's skill level in Open Locks and the difficulty of the lock.
Unlocking Chests
Unlocking chests follows a similar process to unlocking doors. You will need a character with the Open Locks skill to attempt to pick the lock on the chest. When you find a locked chest, click on the character with the Open Locks skill and then on the chest to try to unlock it. Just like with doors, the success of opening the chest will depend on the character's Open Locks skill level and the difficulty of the lock on the chest.
Alternative Methods
If you do not have a character with high Open Locks skill or are struggling to unlock doors and chests, there are alternative methods you can try. For doors, you can sometimes find keys that unlock them either by looting enemies or searching the surrounding area. Chests may also have keys scattered nearby or on enemies that can unlock them. Additionally, certain spells or items in the game may assist in unlocking doors and chests, providing you with an alternative to the Open Locks skill.
Practice and Patience
Unlocking doors and chests in Baldur's Gate II: Shadows of Amn requires practice and patience. As you progress through the game, your character's Open Locks skill will improve, making it easier to unlock doors and chests. Keep practicing and attempting to unlock them whenever you come across locked doors or chests to increase your skill level and success rate. Remember that some locks may be more difficult than others, so don't get discouraged if you fail to unlock a particularly challenging lock at first.