A invasion happens when aline life lands on Earth and rapidly takes over creating these things called Archeans that have different attributes for different types of attacks. Several standing groups comes into the scene after the nation guard and police in certain areas of the world have been taken out.

Types of Archeans.

Nests- Colorful blister like sack that creates seemingly endless Archeans when awoken. Often dormant.

Grunt- Base unit, blade arms, human like body, smart enough to plan and ambush, strong enough to punch through tank armor.

Feral Grunt-fast, crazy, like grunts but with no self preservation, will do anything to kill you.

Spiker- like grunts but shoot spikes from right arm with armor piercing ability.

Storm spiker- Like spiked but shoots purple energy blast with homing ability.

Smoker- Quadruple, large pink sack in back, releases a thick cloud of smoke to enhance other Archeans by creating a smoke screen.

Bloater: Like a smoker but has corrosive gas that eats flesh and metal.

Breacher- like smoker and bloated but highly explosive and sends spikes in every direction when exploded.

Rooter- Gorilla like, blade arms and legs, raptor like skull, quick and agile, will learn and observe from a distance, will doge gunfire, has the ability to smack the ground and create spikes within ten to 15 meters, armored everywhere but neck and underbelly.

Sower- low quadruple, armor over top of body, soft belly, will run and place organic mined everywhere, will attack without you knowing.

Lurker- giant crab like head, bulletproof besides when it opens mouth to show eye, can cloak and make other Archeans cloaked, will sneak attack you.

Tormenter- slim human like, floating, can turn into a puddle to move around, shoots shoot blue energy balls at you, massive bomb attack, hard to kill since it hit and runs.

Smasher- giant, cannon proof, weakness on back, slow but unrelenting, has a charge to move quickly in a single line.

Apex- Floating and human like, fires seeking energy balls, has the ability to create any Archean to help them.

Proteins- Can micmic anything be better at killing you.

Others unclassified yet (make your own)