Designing the Credit System: Free Gameplay, Premium Immersion

Monetization in games is a minefield. Get it wrong and you alienate players. Get it right and you build something sustainable. Here's how we think about it.
The Core Principle
Text gameplay is free. Period.
You can create characters, play adventures, make choices, and experience the full narrative — without spending anything. The AI Game Master, the lore system, the inventory, the stats — all free. You will never hit a paywall that blocks you from continuing your story.
What Costs Credits
Credits are used for AI generation of multimedia content:
- Portrait generation — Creating AI art of your character
- Scene images — Illustrations of your current environment
- Sound effects — AI-generated audio for dramatic moments
- Voice lines — NPC speech with AI-generated voices
These features are genuinely expensive to produce — they require significant computational resources. Credits fund this cost.
The Caching Advantage
Here's where our model gets interesting: cached content is free.
If an image, sound effect, or voice line has been generated before (for any player), the cached version is served at no cost. This means:
- Popular scenes become free for everyone
- Common sound effects become free for everyone
- Frequently spoken lines become free for everyone
The more people play, the more content becomes free. It's a system that gets cheaper for everyone over time.
Monthly Credits
Every user — including free users — receives a monthly credit allowance. This lets everyone experience immersion features without paying. The allowance refreshes monthly, so there's always a reason to come back.
Subscribers get larger monthly allowances, and you can also purchase credit packs for one-time use.
The "Free First" Philosophy
For expensive operations like portrait generation, we offer free generations per character. You can create a character and generate their portrait without spending credits. Want to regenerate for a different look? The first few are free. After that, credits kick in.
This ensures every player gets to experience the full Embertold experience at least once, regardless of their financial situation.
Subscription Tiers
Subscribers get:
- Larger monthly credit allowances
- Discounts on credit pack purchases
- Priority support
But critically, subscribers don't get gameplay advantages. A free player and a subscriber play the same game with the same AI. The subscriber just gets more immersion — more images, more sounds, more voices.
Why Not Ads?
Ads break immersion. You can't lose yourself in a fantasy world if there's a banner ad for car insurance at the bottom of the screen. We'd rather build a sustainable model around the genuine value of premium features than compromise the experience with advertising.
The Long Game
Our goal is to make Embertold better with every session played. Credits fund the infrastructure that makes this possible. Smart caching ensures that the investment of early players benefits everyone who comes after.
It's not a perfect system — no monetization model is. But we believe it's an honest one: pay for what you use, benefit from what others have generated, and always have access to the core experience for free.
Related Posts

Building an AI Game Master from Scratch
The journey of creating an AI that can run tabletop RPG sessions — the challenges, breakthroughs, and design philosophy behind Embertold's Game Master.

From Text to World: Generating Fantasy Art in Real-Time
How we turn narrative descriptions into beautiful scene illustrations on the fly — the prompt engineering, style consistency, and caching that make it work.

The Tools of a Digital Dungeon Master
The AI Game Master has over a dozen specialized tools at its disposal. Here's how it uses them to run your adventure.