Attacker

About
Attackers are weak, faceless, corrupted, foolish but their claws deal serious injuries to un-armored people. They wear white shirts/coats without a reason, either sciencists or shirt-wearers. Depending on physical statistics, their durability may vary, but their agility will be still weak.

If one looks closely, the Attacker might have turned down thorns.

Coop_omega
Attackers make their first appearance in coop_omega3 as they "teleport" to the fireteam's location. Their second appearance was in coop_omega4 where they teleported once a player has activated a button. Their third appearance was in coop_omega6 where they swarmed the fireteam at the sewers. Their fourth and possibly the last appearance was in the near-end coop_omega9.

The Attackers are easy to kill but are quite dangerous when running low on ammo. They use the same AI and appearance as the npc_zombie.

Floater
An oversight-exclusive variant of an Attacker. The floater shares the ability to float above the void same as the Watchers. Their only appearance is at the near-end of coop_omega6, but they have the same stats as the Attackers.