Grand Theft Auto: San Andreas – The Definitive Edition

There are a total of eight guards to kill. For the first half of this section, you will need to kill:

The first guard as you enter
The guard patrolling the pool
The guard who comes after the pool area
The guard by the music room

After you get the rhyme book, hide in the adjacent room, on the other side, as you can hide in the shadows. A guard will come and you can sneak up and kill him. PICK UP HIS SILENCED PISTOL.

From this point, you will make your way back. You will kill a guard blocking your way, just before the room with Madd Dogg. Kill him with the silenced pistol as knifing him will alert Madd Dogg.

After this room, hide in the room on the left as another guard will come patrolling. Take him out when he turns around. The final guard will be patrolling the pool. Take him out, go outside and the achievement will pop. You do not need to kill the guard behind the bar.

Also, as a heads up, if you get caught just get yourself killed. There is a checkpoint as soon as you enter and you can still get the achievement even if you die and respawn at the checkpoint.

If you prefer here is a video guide showing how to do it:

Make sure to HOLD and press behind the enemy to kill him stealthly.

Once you get to Madd Dogg's mansion you will need to use the knife given to you to stealth kill all the guards. You will know that you perform a successful stealth kill when CJ stabs the guard downwards into his neck instead of slashing them. If you fail to perform a stealth kill, allow the guard to kill you and you will be given the option to restart from the checkpoint where you first enter the mansion.

You start off behind Guard 1 and the game gives you a short tutorial on how to stealth kill enemies. Kill the guard and proceed to the pool room.

Guard 2 patrols the pool room in a clock wise pattern. Enter the room and stick to the wall on your right hand side. Eventually he will stop, or if you're skilled enough you can take him down while moving. Get as close as you can to him without touching and stop. There will be a split moment where you can stealth kill him before he gets too far away. Either way, kill him and continue on.

Guard 3 will be patrolling towards you and the game will prompt you to hide in the shadows. Enter the room on the left and wait for him to stand in the doorway, looking into the pool room where he will be easy to take down, then continue down the hallway he came from.

Guard 4 is behind the bar and Guard 5 is sitting on the couch in front of the tv. Guard 4's vision can give you a bit of trouble. I found that hugging the left hand wall of the hallway and moving in a straight line to the second stool from the doorway works every time. Once you get to the stool, move around the bar and take Guard 4 out. Then take out Guard 5 on the couch.

Continue on into another hallway and enter the room on your left with the body armor. Pick it up, (because hey, free armor) and continue through the room. You'll come out behind Guard 6. Take him down and go into the recording studio to pick up the rhyme book.

Once you pick up the rhyme book, stay crouched down behind the recording equipment. Several guards spawn in, including one to your south. Wait for Guard 7 to move through the body armor room and follow him. He'll stop in the doorway and will be easy to kill. Head back to the lounge.

Guard 8 is in the doorway, facing away from you. Kill him and ignore Guard 9 on the couch for now. Guard 10 is behind the bar and I found he'll sometimes catch you killing Guard 9. Move to the entrance behind the bar and hug as far left as you can. Sneak up behind Guard 10, then go back for Guard 9. Before exiting the lounge, turn the camera so you can look down the hall.

Guard 11 has a patrol route moving towards you and then away. Wait for him to turn away from you and then sneak into the room on the left. Wait for him to come back again and when he turns back and begins to walk away, sneak out and kill him. You need to be quick so take him out by getting close to him while he's walking then stealth killing him before he's out of range. Once he's down turn the camera so you can see into the pool room.

Guard 12 follows the same path as Guard 2, clockwise around the pool room. Wait for him to move right, past the door and follow him. Take him out when you're ready and then take a deep breath, you've done it. Exit the mansion and the achievement should pop when you're back on the overworld map.

I'd just like to add in addition to the other guides, if the guard dies via the stealth kill animation and CJ does NOT perform his half of the animation, this STILL counts.

If you slash you will have to die and try again however.

Though when you do get the silenced pistol just headshot the rest, particularly the guard standing in the middle of the doorway into the lounge/bar area as I have knifed him more than once and had the gent on the couch playing his game notice.

Achievement pops upon leaving the mansion.

This is not a hard achievement, just take your time. Be sure to hold LT and tap RT once when you are close enough. Check this video out to give yourself an idea of what to do. If you get spotted don't worry just get killed and try again.

任务-海滩生活
隐蔽干掉室内的所有敌人

I just struggled with this before looking for others' experiences, and based on some observations, this was my run:

For part 1, knifed the first three guards, knifed the guard behind the bar, and skipped the guy on the couch. For part 2, knifed the first guard, took his gun, and shot the second guard. Skipped the guard on the couch and behind the bar, shot the next guard, and skipped the pool guard.

From what I can tell, this achievement is exceedingly poorly worded, and all it requires is to get in and get out with the rhyme book without being detected. You don't need to kill everyone, and you don't need to only use the knife. I spent a lot of time trying to do what I thought the achievement meant before coming to this realization.