关底 meaning in English

boss

You ' ve made it to the end of the game ! you won
你们已到达游戏的关底!你们赢了
That when we reach the end of the game -
当我们到了关底的时候
Swept the world of the classic aircraft shooting game , lightning and meet you again , but this time it is the lightning flash version . but very pretty picture , but also the end of the aircraft boss
风靡全球的经典飞机射击游戏雷电又和大家见面了，不过这次的雷电是flash版，但是画面很漂亮，还有关底的boss级飞机！
Introduction : swept the world of the classic aircraft shooting game , lightning and meet you again , but this time it is the lightning flash version . but very pretty picture , but also the end of the aircraft boss
风靡全球的经典飞机射击游戏雷电又和大家见面了，不过这次的雷电是flash版，但是画面很漂亮，还有关底的boss级飞机！
Phlinx takes you to a far - off land where myths and treasures are waiting to be revealed ! create groups of colored stones , collect ancient power - ups and make your way to the nighttime bonus round . solve the mystery of the phlinx in classic mode by completing game rounds to unlock chapters of the story
Action模式极负挑战性，以我的心脏承受能力看我只打了一关，看到关底画面就知足，分数自然高不到哪去，我也就不往上放了，不过到底一共有多少关我也不知道，哪位能打通这个模式有图就传上来吧。