Undying Loyalty: ADVENT have a chance to be reanimated as Psi Zombies when they die.

Stiletto Rounds: ADVENT gain special rounds that inflict 'Bleeding' status.

Gone to Ground: Black Market is closed for 6 weeks, and must be rediscovered.

Signal Jamming: Increases all scanning times for 6 weeks.

The War of the Chosen DLC adds more Dark Events to the pool.

Vigilance: The size of alien detection radii is greatly increased.

Show of Force: More enemy units are added to each mission.

Rapid Response: Guaranteed ADVENT reinforcements on all Guerilla Ops.

ADVENT Rural Checkpoints: Next Supply Drop supplies reduced by 50%.

ADVENT Midnight Raids: All recruiting costs doubled.

Viper Rounds: Some ADVENT troops gain Venom Rounds, poisoning your troops if they are hit.

New Construction: The Alien Facility Construction counter is reduced by two weeks.

Resistance Mole: The Retaliation counter is reduced by two weeks.

Infiltrators: Faceless spawn on every mission, disguised as civilians.

Infestation: Chryssalids spawn on every mission.

Hunt Avenger: A UFO is dispatched to hunt the Avenger if it finds it, it will trigger an Avenger Defense mission.

Avatar Major Breakthrough: 2 blocks of progress are instantly added to the Avatar project at a random location.

Avatar Minor Breakthrough: 1 block of progress is instantly added to the Avatar project at a random location.

ADVENT Alloy Padding: Some ADVENT troops get an extra point of armor.

Most Dark Events last for a month, although some have instant effects once completed. As such, it is possible to sometimes prevent more than one of the listed projects based on how you tackle them.

You can spend 20-30 Intel to reveal the Dark Event, but it is optional.ĭark Events are worked on in sequence, though not necessarily the sequence presented in the game. One Dark Event per cycle is usually a 'Hidden Event' you will not know what it is.

They will usually undertake 3 per month (2 at the start of the game) and you will have the option of preventing one of them with a Guerilla Operation. Dark Events are activities undertaken by the ADVENT administration to counteract XCOM operations.

Xcom 2 made whole