在主菜单上，按住shift键并在屏幕右上角单击扬声器，这是第一次将您带到秘密任务开始屏幕，然后您可以在“任务选择”屏幕中找到它。早在1995年的原始游戏中包含一张带有莫尔斯电码的工作表，解密后会告诉您这一点。
英文原文：
On the main menu hold shift and left click the speaker in the top right
corner of the screen
The first time doing this will take you to the secret mission start screen,
and afterwards you can find it in the "mission select" screen.
The original game back in 1995 contained a sheet with morse code on which
when deciphered told you this. Nice to see they have added it here!
