This is the 9th level in the Alien Campaign. It has a medium difficulty, and is played at the map Frostbite, in deathmatch mode. At the beginning of the level, you and your teammates are cloaked. This, however, doesn't affect your current ability. While cloaked you can't attack, oor use your ability. When the cloaks goes off, begins the Ambush on the humans.
Oddly, the cloak lasts for a really long time.
In the human campaign, this level is in domination mode.