Silica – Alien Structures Guide

Alien structures, comprising of biological materials, are “grown” from biotic matter.

Guide to Alien Structures


These buildings are all connected to the Nest, where the Queen resides. Units are spawned from within these structures, and some provide research capabilities while others serve as defensive turrets. Generally small in size, alien structures are easier to conceal and take much less time to build than human structures.



A Nest provides protection for the Queen and allows her to interface with biotic structures.

Bio Cache

A Bio Cache serves as both a deposit point and a storage point for Biotics.


A small cyst whose sole purpose is to extend the Nest’s territory.

Lesser Spawning Cyst

A smaller cyst for spawning basic creatures.

Greater Spawning Cyst

A larger cyst for spawning superior creatures.

Quantum Cortex

This organism’s intellect allows it to formulate and confine an unknown form of matter, utilizing it to conceive greater evolutionary forms.

Game Start

The Lesser Spawning Cyst can spawn Shrimps and Crabs.

Alpha I

The Lesser Spawning Cyst can now additionally spawn the Horned Crab and the Impaler.

Beta II

In the Nest, you can now produce the Greater Spawning Cyst and a new Nest.

The Greater Spawning Cyst can spawn the Hunter.

Gamma III

The Greater Spawning Cyst can spawn the Behemoth and the Scorpion.

In the Nest, you can now produce the Thorn Spire and the Hive Spire.

Omega IV

You can now spawn the Goliath from the Greater Spawning Cyst.

Hive Spire

A spire-like organism that releases a swarm of flying insects for defense.

Thorn Spire

A spire-like organism that fires thorn projectiles from its proboscises for defense.

Egor Opleuha
About Egor Opleuha 7657 Articles
Egor Opleuha, also known as Juzzzie, is the Editor-in-Chief of Gameplay Tips. He is a writer with more than 12 years of experience in writing and editing online content. His favorite game was and still is the third part of the legendary Heroes of Might and Magic saga. He prefers to spend all his free time playing retro games and new indie games.

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