!!Mod Caution!! 
The mod works only when each of the players has the Mod. 
You can't go online when modded but still can invite friends into your lobby using Steam or CrossPlay invitations.

The way to put the mod (.pak file) in: 
Steam\steamapps\common\Aliens Fireteam Elite\Endeavor\Content\Paks\~paks\
There's no ~paks folder in the Paks folder by default, so just create it and put the mod file (.pak file) into it.

Each of the new cards is grey colored in the challenge card list to be found easily.
*It's recommended to use one card at a time since some of the cards are the same card in the game.

Description of the cards:
More Of Them Are Pissed Off
1 of 16 random Elites spawns each time 50 foes are killed.
The Elites spawned by the Card:
1) Warrior
2) Crusher
3) Praetorian
4) Praetorian Royal Guard - unused Praetorian, one head taller and slower than the regular Praetorian, doesn't grapple the Player, but is still very dangerous, has HP & Armor of Stalker
5) Praetorian AddCaller - another unused Praetorian, or the regular Praetorian by appearance, but if not killed within a minute, calls for another Praetorian to spawn, up to 2 additional praetorians, so the Player may have 3 active Praetorians at once
6) Drone Monica - Drone from Mission 1-2, when damaged enough, runs to the walls and then goes back to the Player, and so on untill killed
7) Drone Monica Escape - Drone from Mission 1-2, when damaged enough, runs to the walls and never comes back
8) Large Burster Wave - wave from a horde mode consisting of 8 bursters
9) Irradiated Spitter
10) Heavy Synth
11) Incenirator
12) Sniper
13) Stalker
14) Stalker Stealth - Stalker from Missions 3-3, 5-3, can't be seen on the Movement Tracker when appears and dissapears
15) Brute
16) Pathogen Queen - nerfed Queen from 5-3, has Drone Monica's HP & Armor, which means you will have the Queen on 5-3 with the same HP & Armor values

More Of Them Are Pissed Off - Hard
1 of 16 random Elites spawns each time 40 foes are killed.

More Of Them Are Pissed Off - Extreme
1 of 16 random Elites spawns each time 30 foes are killed.

More Of Them Are Pissed Off - Insane
1 of 16 random Elites spawns each time 20 foes are killed.

More Of Them Are Pissed Off - Impossible
1 of 16 random Elites spawns each time 10 foes are killed

Beautiful Butterflies - Insane
All Xenomorph Runners are now spawned as Xenomorph Prowlers, and all Maintenance Synths are now spawned as Synth Trackers. Each of the replacements has its default health values. Can be used in horde modes.

Explosions! - Insane
All Xenomorph Runners are now spawned as Xenomorph Bursters, and all Maintenance Synths are spawned as Synth Detonators. Each of the replacements has its default health values. Can be used in horde modes.

Buffed Foes
Each Enemy spawns with a modifier that grants it Doubled Health. Can be used in horde modes.

Killing Machines
Enemies can't be Stumbled and have increased Movement Speed, Damage Dealt and Damage Resistance values. Can be used in horde modes.

Knockbacks
Running onto the Enemy, or when they run onto the Player, knockbacks the Player. Can be used in horde modes.

Stay Alert!
The Motion Tracker doesn't work anymore. Can be used in horde modes.

They Are Evolving!
Enemies spawn with 3 random modifiers. They may have Doubled Health, Move 33% Faster, or be Unaffected by most Stuns, Stumbles, and Knockdowns. Can be used in horde modes.

Armored Foes - Insane
Each Enemy is now Armored. Can be used in horde modes.

Armored Foes - Impossible
Each Enemy is now Armored and has Twice as much Armor. Can be used in horde modes.

You Better Run!
Each Enemy spawns with a modifier that grants it an additional 33% Movement Speed. Can be used in horde modes.

Unexpected Strength - Increased Chance
Whenever a Xenomorph Runner, Maintenance Synth, Synth Guard, or Mutated Runner are about to spawn, there is a x2 time increased chance they will be stronger than normal.
(The card has been added Mutated Runner and it's replacements - Husk, Mutated Scientist, and Mutated Spitter)

They're Getting Stronger!
Whenever a critter with above than fodder rank spawns, it becomes a Special, and a Special becomes an Elite. The strongest Elites may spawn in Pairs. Can be used in horde modes.
(Facehugger = 2 Bursters; Burster = Prowler; Prowler = Drone; Spitter = Irradiated Spitter; Irradiated Spitter = Warrior; Drone = Monica; Warrior = Praetorian; Praetorian = 2 Praetorians; Crusher = 2 Crushers; Worker = Detonator; Detonator = Incenirator; Enforcer = Tracker; Tracker = Sniper; Sniper = Heavy; Blocker = 2 Blockers; Heavy = 2 Heavies ; Incenirator = 2 Incenirators; Mutated Scientist =2 Husks; Husk = Mutated Scientists; Mutated Spitter = 2 Mutated Spitters; Stalker = 2 Stalkers; Brute = 2 Btures; For horde modes: Prowler = Drone; Burster = Jumper; Warrior = Praetorian; Praetorian = Crusher; Crusher = Praetorian)

They're Getting Stronger! v.2
Whenever a critter with above than fodder rank spawns, it becomes a Special, and a Special becomes an Elite. The strongest Elites spawn in Pairs. Can be used in horde modes.
(Facehugger = Spitter; Burster = 2 Bursters; Prowler = 3 Facehuggers; Spitter =2 Prowlers; Irradiated Spitter and Drone = Praetorian; Warrior =2 Warriors; Praetorian = Drone Monica; Crusher = 2 Irradiated Spitters; Worker = Blocker; Enforcer = 2 Enforcers; Tracker =2 Detonators; Synth Sniper = 2 Trackers; Synth Blocker = Synth Sniper; Incenirator = Heavy; Heavy = 2 Incenirators; Stalker & Stalker Stealth = Brute; Brute = 2 Stalkers Stealth; Mutated Scientist =4 Poppers; Husk = 2 Mutated Runners; Mutated Spitter = 4 Mutated Scientists; For horde modes: Prowler = Drone Monica Escape (runs to the walls when damaged enough); Burster = 2 Bursters; Warrior and Crusher = 2 Warriors; Praetorian = 2 Praetorians)

*More cards to be uploaded in future.