Plasma Bug
Plasma Bugs are able to discharge plasma at enemines
Tanker Bug
The Tanker Bugs resemble a giant beetle and play the role of tanks/armors of the Arachnid Forces.
Plasma Warrior
Plasma Warrior bugs are a breed of Warrior with the ability to shoot Plasma
Warrior Bug
The Warrior Bug is the basic grunt of the Arachnid species.
Brain Bug
Brain Bugs are the leaders of bug colonies
Worker Bug
Worker bugs do the manual labour for the pseudo-Arachnid colonies, digging and upkeeping the tunnels.
MZ-90 Fragmentation Grenade
A pretty powerful grenade, capable of doing massive damage to weaker bugs
Firefly Bug
Firefly bugs are a subclass of Hopper Bugs that can shoot fire.
Arkellian
Small and low-armored bug, considered to be one the lowly worker types.
Tactical Oxygen Nuke
When guns don't quite cut it, just blow them away! Careful though as it's still not safe for you!
M55 Rocket Launcher
When you don't want to wait till a bug is right on you to blow them and possibly yourself up.
Scorpion
The scorpion class pulse warrior is a heavily armored bug.
Tiger Bug
The Tiger Bugs are stronger variant of the Warrior Bugs.
Morita Assault Rifle MK 2
Certainly a more powerful version of the MK1 and even has the grenade launcher built into it!
Morita Assault Rifle MK 1
They can have grenades launchers and scopes attached to them for more versatile usage
Hopper Bug
The Hopper Bugs are essentially a Warrior bug with wings.