The Ceph Assault Command Units shortened to "Stalker Commanders", are Ceph warriors that supposedly act as field officers for lower-ranking Ceph. They only appear in Crysis 2. They drop 300 Nano Catalyst upon death.
Ceph Stalker Commanders are one of the two different kinds of Commanders, the other one being the Ceph Grunt Commanders.
Stalker Commanders are about as tall as Stalkers, measuring at least 6 feet tall. Their exoskeletons resemble those worn by Guardian Units, but are colored much darker and are slimmer. Commanders also wear helmets that have two red-colored panels on each side of the face rather than the multiple "eyes" of other Ceph units.
Another notable difference that the Commanders have compared to their minions, aside from their equipment, is that the jelly-like "flesh" of the Commanders is crimson red instead of pink. In addition, when they activate their energy shield, their unique Assault Commander armor is instantly covered in a constantly-moving reddish body-shielding.
When Stalker Commanders are shot, they usually activate their armor shield, making them highly-resistant to ballistic damage; this renders a bullet-fueled attack useless until the shield lowers. Fortunately, explosive and melee-based attacks are unaffected. Either grabbing or power-punching can easily kill a Stalker Commander.
On the other hand, stealth kills can instantly kill a Commander--however, a stealth kill is not possible once they turn their shield on. Commanders are always found with at least one or two lackeys, so players should keep their eyes open for more Ceph.