With (currently) two distinct factions spanning several planets at a time, has plenty of enemies to fight, some of which require specialized strategies or weapons, and all of which can pose a deadly threat if taken too lightly. Among the game's roster of enemies, however, a select few particularly stand out for being difficult to deal with and, especially on higher difficulties, requiring good squad coordination and well-put-together loadouts.
While the first few difficulty levels of won't pose much of a challenge even to inexperienced or solo players,any difficulty higher than Medium will begin to introduce more powerful enemies, many of which are covered in armor that completely deflects the rounds fired by most weapons and have hard-to-hit weak points. Many of these enemies can cause major problems for the squad if left alive, and all but require specialized weaponry to take down in a timely manner — especially on the highest levels of difficulty, where even the most challenging enemies can become common spawns.
Brood Commanders might not seem very threatening on their own, especially since they're distinctly slower than other Terminids, but they come with large crowds of bugs, which can very quickly end up snowballing into a full Bug Breach. Additionally, while Brood Commanders are fairly slow, they're also more heavily armored than any of the other common Terminid enemies, making them difficult to take down from the front, and they can easily catch up to players occupied with other enemies.
Part of the common spawns for Automatons, Berserkers are more heavily armored than the basic Commissar enemies and can spawn in great numbers — so, while they won't be shooting like most other Automaton enemies, their durability and numbers can make them difficult to deal with, especially for players using weapons with less damage or armor penetration. While Berserkers have easily identifiable weak points in their heads and arms, which can all be blown off, they can easily
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