This is new alien units which are already available in the game:

Berserk



Alien Berserk is designed for breakthrough in battle. It is armed with a powerful impulse generator, four glowing blades and able to move around on land and on the seabed. Berserks are effective in the fight against infantry and armored vehicles but are useless against enemy aircraft.

Cyclops



This class of anti-air combat droids is designed for long range attack by launching multiple guided missiles.

I just created and added this units to the game, so they probably changed the gameplay balance. But I hope to fix that with your advices.

Thanks for playing and have fun!

More updates you can see at the official development blog.