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XCOM-EU Chrysalid
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Critical Chance
0 | 0 | 10 | 10
10 | 10 | 10 | 10
8 | 8 | 8 | 8
20 | 20 | 20 | 20
120 | 120 | 120 | 120
Weapon Chryssalid Claw: 7 Damage + Poison
Abilities XEU AlienAbility LeapXEU AlienAbility PoisonousClawsXEU AlienAbility Implant
Traits HardenedXEU AbilityPlaceholderXEU AbilityPlaceholderXEU AlienAbility StunImmune

A Chryssalid is an enemy in XCOM: Enemy Unknown.


The Chryssalid is a swift, four-legged alien with terrifying melee capabilities. Usually first encountered in small groups on Terror Site missions, Chryssalids deal heavy damage with melee and have a high chance to inflict poison.

When a Chryssalid kills civilians or soldiers, it will implant an embryo in them. This causes them to rise up as Zombies in the next turn, which will spawn Chryssalid Hatchlings after the next 3 turns. As shown in the Site Recon mission from XCOM: Enemy Within, they can also use sufficiently large bioforms (such as a whale) as an incubator hive. Chryssalids are defined by the Ethereal hive mind as a huge disappointment for lack of controllability.

Killing other aliens with a Mind Controlled Chryssalid does not make them rise up as a Zombie in the next turn.


Chryssalids appear during the first month, regardless of the game's "Marathon" Second Wave option. Their chance of being deployed declines from May to July (Marathon: June to October), as units such as Cyberdiscs and Berserkers are introduced. Chryssalids can be deployed for several mission types, including terror sites and large UFO landing and crash sites, but are not encountered during abduction missions.


Ability Description
XEU AlienAbility Leap  Leap Allows vertical leaps onto elevated surfaces during movement.
XEU AlienAbility PoisonousClaws  Poisonous Claws Poison enemies wounded with melee attacks.
XEU AlienAbility Implant  Implant Victims are implanted with a Chryssalid egg if they are killed by a Chryssalid's attack (not from poison caused by Poisonous Claws).


Trait Description
XEU AbilityPlaceholder  Melee Only Can only attack at close range; no ranged weapons or abilities.
XEU AbilityPlaceholder  Poison Immunity Immune to all poison damage.
Hardened  Hardened Reduces the chance of suffering a critical hit by 60%.
XEU AlienAbility StunImmune  Stun Immune This unit cannot be stunned with the Arc Thrower; taking a live specimen is not possible.


  • Despite being obviously organic, Chryssalids cannot be stunned. Possibly because their physiology is radically different from humanoid beings, so an electric shock does not affect them in the same way.



Chryssalids can cover great distances in a single turn, have enough durability to survive multiple hits from all but the heaviest guns, and ignore cover when making attacks. However, they will usually stay in one place for a period of time after crawling a long distance, even if a target is in front of them.

When facing groups of Chryssalids, you may wish to retreat to cleared territory before firing in order to create as much distance between you and the Chryssalid as possible, however; Assault soldiers with the appropriate critical boosting abilities and a Shotgun (or, more preferably, a Scatter Laser) can kill one with a single shot at point blank range. Naturally getting up close and personal with a Chryssalid is potentially fatal, so further augmenting this tactic with the Rapid Fire ability will greatly improve your odds of success.

As Chryssalids carry no equipment, you can use explosives to kill them without any penalty, as corpses will not be destroyed (and thus Chryssalid Corpses can be used to craft Chitin Plating, since equipping soldiers with that item greatly reduces the threat these foes pose).

Overwatch also reduces the threat Chryssalids pose, as they have to move close to their targets. Assault troopers with the ability Close Combat Specialist can also exploit this.

Chryssalids are highly resistant to psionics; at 120 Will the chance to Mind Control is approximately 37%. As of update 3 of the game, at the Classic difficulty, the chance to Mind Control Chryssalid with soldier having 95 base Will and wearing Psi Armor (115 Will total) is 60%. The soldier having 100 base Will and wearing both Psi Armor and Mind Shield (and having 150 Will total) has 85% chance to Mind Control Chryssalid.

In XCOM: Enemy Within, Chryssalids are very susceptible to a MEC's Flamethrower as revealed pods tend to advance together or bunch up around victims. In addition to wounding or killing a number of the aliens, the Flamethrower can also cause Chryssalids to panic and run away.


Although its poison is a useful ability, you should try to hold your Chryssalid in reserve and target only humans that will be killed in one attack.  The ability to spawn Zombies is by far the most useful ability of the Chryssalid, and once spawned you should have them run away immediately until they mature into a new Chryssalid.

Although the Chryssalid can cover a massive distance in one turn by using both actions for moving, there is no point if you cannot attack after moving.  You must keep it hidden at all costs until an enemy comes within range.  One good tactic is to keep it inside a building near the wall, then have it leap up and attack unsuspecting soldiers on the roof. They can be utilized as assassins but must one shot the target or nothing will be gained.

Remember that Chryssalids do not receive cover, so it is useless to keep it directly on a corner.  It must be at least 1 space back from the corner in order to not be spotted.

Good Against: most Humans

Bad Against: Assaults, Flying units


  • Their creation were probably inspired by the 1982 film The Thing (or it's later 2011 remake).
  • They seem to be able to 'see' soldiers with Mimetic Skin, but will not attack them.
  • In the original UFO: Enemy Unknown (1994), Chryssalids are crab-like creatures that stand on two legs. They have the same role as quick-moving terror agents that can impregnate victims, and are often teamed with Snakemen.


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