Approaching stealthily can be done in a variety of ways, such as stalking, creeping up, sneaking up, or creeping up on someone. Stalking is the act of following someone without their knowledge, while creeping up is the act of slowly and quietly moving closer to someone. Sneaking up is similar to creeping up, but it involves more of an element of surprise. Finally, creeping up on someone is the act of slowly and quietly moving closer to someone until they are within reach. All of these methods involve approaching someone without them noticing, making them ideal for stealthy approaches.