@李得豹 你說沒殺到的那三個人應該是巨人，在地圖角落有個倉庫，按紅色按鈕打開他們就會出來了，那個倉庫就在出生點的對面，有兩個持槍守衛的地方

@李得豹 藍色鑰匙在餐廳那邊的電梯，搭到三樓辦公室，櫃子上自己找

To find the blue keycard, you need to go to the room a little pool in it. Then take the elevator on the left. You will find the blue keycard on one of the shelves

where do you find the blue keycard?

wheres sandbox

蓝色钥匙没找到，找到门了，有没有人告诉我门后是什么样的，还有三个人没杀斯

Ok now I found them. Had to be peaceful.

One of the elevators is broken and pushed me out of the map. I think it was supposed to go down but t went up instead and brought me into an area I couldn't get back from.
Please tell me how to get the sandbox, this level is frustrating to have to go through normally multiple times, I couldn't even find any keycards and I killed a lot of guys who seemed like bosses.