Celatid Turret: These work very differently from their classic versions. They are biomechanical, which means they can be affected by Psionics, most mental ailments, and can get fatigued, but they are still vulnerable to things like Bluescreen Rounds and EMP Grenades. Their armor does not protect them from fire, but being Celatids they are still immune to Poison, Chryssalid Poison and Stun. Since they aren't fully mechanical, they can't be hacked. Celatid Turrets' weapons never have to be reloaded, and they can fire a standard shot without ending their turn. They also have a new ability, Turret Persistence, which lets them take another Overwatch shot if their first attempt misses, against the next eligible target. They also have little mechanical hand-like things going on, letting them grab timed loot and mark supply crates. They're intended to replace the original deployable version, as I find the latter rather unbalanced, especially in the LWOTC setting. By default, a Celatid Turret takes 5 days to build in an unmanned Proving Grounds for 10 supplies, 1 Celatid Corpse and 1 Advent Trooper Corpse. You need the Celatid Autopsy, Advent Trooper Autopsy, and Hybrid Materials research to unlock them.

Alloy Celatid Turret: Compared to the basic Celatid Turret, they have improved durability, dodge, will, and deal more damage with their primary weapon. They also gain the Ever Vigilant ability. By default, an Alloy Celatid Turret takes 8 days to build in an unmanned Proving Grounds for 25 supplies, 1 Celatid Corpse and 1 Advent Officer Corpse. You need the Celatid Autopsy, Advent Officer Autopsy, Plated Armor and Magnetic Weapons research to unlock them.

Elerium Celatid Turret: Compared to the Alloy Celatid Turret, they have improved durability, dodge, will, and deal more damage (plus a little bit of Rupture) with their primary weapon. They also gain the Return Fire ability. By default, an Elerium Celatid Turret takes 11 days to build in an unmanned Proving Grounds for 50 supplies, 1 Elerium Core, 1 Celatid Corpse and 1 Muton Corpse. You need the Celatid Autopsy, Muton Autopsy, Powered Armor and Plasma Rifle research to unlock them.