Crystal Guardians Prologue

Roguelike tower defense with expanding maps and customizable tower builds

Green Pine Studios · Released Jan 8, 2024

Reviews: Very Positive; 94% of 82
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 2 years ago; Feb 5, 2024
Minimum PC: GTX 670; 8 GB RAM · 0.6 GB disk; Full requirements

What is Crystal Guardians Prologue?

This free, single-player prologue is an isometric tower defense game about protecting a base crystal. You place towers, combine them with crystals, and buy items to upgrade them as enemy waves approach. The prologue contains the first 40 waves, including boss encounters.

For you if...

+you enjoy experimenting with builds across repeated runs
+you like adjusting game speed while managing enemy waves

Not for you if...

−you prefer fixed maps you can memorize in advance
−you want a complete game rather than a limited preview

What players say

94% of 82 reviews are positive

Players praise the variety of tower combinations, item synergies, and between-run progression. A reviewer finds the visual effects overwhelming, while another says item interactions and advanced tower abilities need clearer explanations.

Screenshots and trailer

Crystal Guardians Prologue system requirements

Minimum: GTX 670, 8 GB RAM, 0.6 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10+
Processor: Quad Core I5 or AMD equivalent
Graphics: GTX 670 or AMD equivalent
Memory: 8 GB RAM
Storage: 600 MB available space

Does Crystal Guardians Prologue have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Crystal Guardians Prologue run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some in-game text is small and may be hard to read
The native resolution is not the default one
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 16
Steam features: Family Sharing
Languages: Text only: English.

Does Crystal Guardians Prologue use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam