
Olivia's World: Crystal Keep
Built from our imagination for my six-year-old daughter, this bootstrapped solo-dev project — Olivia’s World: Crystal Keep — is a story-driven tower defense RPG. Build spires, survive escalating waves, fight in real-time, and uncover a hidden mystery.
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About Olivia's World: Crystal Keep
This game began with a simple idea from my daughter.
She asked me to make her a game—her world, her characters, her imagination brought to life. What started as a small personal project quickly grew into something much bigger. Together, we talked about the world, the places in it, and the kinds of heroes who would live there. She helped shape the tone, the personalities, and the feeling of the adventure, while I worked on turning those ideas into something playable.
Every Guardian, every environment, and every piece of the story is rooted in those early conversations. It wasn’t about following trends or building something for the market—it was about creating something meaningful that she could recognise as her own.
From a development side, this was built from the ground up as a solo project. The systems, the gameplay, the engine—everything was created step by step, learning and solving problems along the way. It’s a handcrafted experience, shaped both by technical work and by the imagination that started it.
At its core, this game exists because a kid asked her dad to make something special.
Olivia’s World: Crystal Keep
A story-driven tower defense RPG set in a peaceful fantasy world on the brink of elemental war.
You play as a Guardian sworn to protect towns, kingdoms, and floating crystal isles from goblins, wargs, and corrupted armies. What begins as a routine defense quickly spirals into a wider conflict — one that challenges everything the world believes about its history… and its enemies.

Tactical Defense Meets Real-Time Action
Each map blends structured, wave-based tower defense with real-time Guardian combat.
Place your defenses along defined enemy paths. Adapt to evolving waves. Survive escalating assaults as enemies push toward your exit point.
Your spires automatically engage incoming threats, while you step into battle with powerful Guardian abilities when the tide turns.
Victory comes from positioning, resource management, timing, and understanding enemy behaviour — not reflexes alone.

Play as Distinct Guardians
Choose from a roster of unique Guardians, each with:
Their own abilities and combat style
Different strategic strengths and synergies with your defenses
A personal role within the unfolding story
Every Guardian offers a new way to approach each defensive map, encouraging experimentation and replayability.

A Character-Driven Fantasy Story
As the war spreads, you’ll uncover a deeper narrative of forgotten history, fractured loyalty, and a mysterious enemy whose motivations are far more complex than they first appear.
This is not a story about stopping the end of the world.
It’s a story about balance, truth — and the cost of ignoring the past.

A Complete Experience
Handcrafted wave-based levels
Strategic structure placement and upgrades
A clear beginning, middle, and end
No endless grind
No procedural filler
Olivia’s World: Crystal Keep is the first chapter of a larger saga — but it stands alone as a complete and self-contained tower defense experience.
Game details
Game details
Age ratings
Game modes
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Features
Olivia's World: Crystal Keep price history
Lowest tracked price: €4.67 (Jul 7, 2026) · current best: €5.19.
Olivia's World: Crystal Keep reviews
67% positive reviews all-time.
Olivia's World: Crystal Keep — frequently asked questions
Where can I buy Olivia's World: Crystal Keep at the cheapest price?
Right now the cheapest offer for Olivia's World: Crystal Keep is €5.19 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price Olivia's World: Crystal Keep has ever been?
The lowest price KingsPrice has tracked for Olivia's World: Crystal Keep is €4.67 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
How can I get Olivia's World: Crystal Keep at a discount?
Create a free price alert on this page and KingsPrice will email you when Olivia's World: Crystal Keep drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
System requirements
Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: Intel Core i3 (4th gen) or equivalent
- Memory: 4 GB RAM
- Graphics: Integrated Intel HD Graphics 4000 or better
- DirectX: Version 11
- Storage: 3 GB available space
- Sound Card: DirectX® compatible sound card
- VR Support: No
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: Intel Core i3 (4th gen) or equivalent
- Memory: 4 MB RAM
- Graphics: Integrated Intel HD Graphics 4000 or better
- DirectX: Version 11
- Storage: 3 MB available space
- Sound Card: DirectX® compatible sound card
- VR Support: No













