Trooper Variants:
- Soldier: Has a point of armor.
- Heavy: Has two points of armor, but has less life. He's also slower.
- Striker: Strikers use Shotguns. Their increased mobility makes them efficient flankers.
- Veteran: The Veteran uses explosives in combat. He has more grenades than standard troopers and uses them more aggressively.
- Breaker: Breakers are anti-armor units that can pierce and shred XCOMs toughest armors.
Captain Variants:
- Battle Commander: Has two points of armor.
- Sniper: The sniper uses a sniper rifle from the back of the team. He also has higher sight and detection ranges.
- Beastmaster: Instead of Troopers, this captain fields Pet Chryssalids into battle.
- Riot Control: With his Flashbang Grenade, this captain can disable a whole XCOM-team.
- Adept: The adept learned a few tricks from the aliens. Depending on when you encounter them, their unique Mindspin variant gets additional effects.
- Heavy Tactics: Equipped with a cannon and the ability to shred armor, this captain can provide excellent support fire.
- Warden: The Warden uses a stun baton alongside his assault rifle.
Shieldbearer Variants:
- Breacher: Uses a Shotgun.
StunLancer Variants:
- Taskmaster: Standard Stunlancer, but with improved AI.
- Assault: Carries a Shotgun. Thanks to the Taskmaster AI, he will actually use it, too.
- Shieldlancer: A hybrid of the shieldbearer and the lancer. Uses Energy Shield before he tries to taze you.