I introduce you map called "Choice". Map is quite easy, and have 2 endings.
You have to choose which way you run out from hive. In the first chapter you have 2 saferooms, the way you choose to go defines the rest of the game and enemies you encounter.
Here is some video for you:
You can okay it in game already, just go to escape user maps and search for "bmbr1990 - choice"