Rival Books of Aster

Strategy card battles where spells double as storybook pages

Games by Stitch · Released Mar 25, 2024

Reviews: Mostly Positive; 73% of 75
Recent reviews: Not enough recent
Players: 0; daily peak, Nov 7, 2026
Steam Deck: Untested
Last update on Steam: 9 years ago; Sep 13, 2017
Minimum PC: 1 GB RAM · 0.5 GB disk; Full requirements

What is Rival Books of Aster?

A free-to-play card game set in Aster, where four rival books are translations of a lost source. You build custom spell decks and face other players in ranked matches or practice against AI, deciphering the books to save your household.

For you if...

+you enjoy experimenting with spell combinations and deck strategies

Not for you if...

−you expect to expand your collection entirely through play

What players say

73% of 75 reviews are positive

Players praise the manuscript-style artwork and occult lore. Complaints focus on sluggish play and hard-to-read interface elements, while some players report difficulty finding opponents.

Screenshots and trailer

Rival Books of Aster system requirements

Minimum: 1 GB RAM, 0.5 GB of disk space.

As published by the developer.

Can my PC run Rival Books of Aster?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: 10
Memory: 1 GB RAM
Storage: 500 MB available space
DirectX: Version 9.0

Does Rival Books of Aster have co-op or multiplayer?

Yes: PvP online. There is no single-player mode. Crossplay with other platforms is declared.

Does Rival Books of Aster run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS
Steam features: Family Sharing
Languages: Full audio: English.

Does Rival Books of Aster 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 28, 2026. How to filter AI games on Steam