Are there any ways to make an AI that sneaks up on the player?

[candid pulsar]

Hello everyone! Is it possible to make an AI that sneaks up on the player? If yes, are there any tutorials on how to do it?

[mystic meadow]

Now i am not that good at programming but i have a idea to how you could do it. You could make it so it doesnt appear before it is close enough to the player

or make it invisible