Sectoid ver. 2

- appear on early missions (but as superior to ADVENT's grunt)
- equipped with wrist-mounted blaster.
- Mindspin: a roulette-type mental attack that has a chance to disorient a soldier
- Mind Control: you know the drill d
- Psi Reanimate: raise anyone from the dead – ADVENT soldiers, civilians and even XCOM soldiers.

Muton ver.2

- appear on mid missions (advanced a lot of tech/research progress in-game)
- Suppression: keep your unit pin down and gets free shot if the suppressed unit move
- Alien Grenade: throw a grenade to your clustered unit.
- Counterattack: has a chance to ignore melee damage and instantly respond with a melee strike of their own. (now we have to roll dice on the close quarter kill)
- melee attack: they can go on melee your unit like berserker cause of their weapon equipped with bayonets

Chryssalid evolved (hated unit #2)

- melee attack carries poison effect
- if your unit or civilian dies when the poison is still active, the dead unit will form a cocoon
- if that cocoon is not destroy within a certain amount of turn, the cocoon will spawn 3 Chryssalid evolved in the battlefield
- Chryssalid evolved can burrow underground and auto attack your unit who walk into its burrowed area. but can't move while burrowed.