Rival Books of Aster is a strategy deck building game that features over 140 hand illustrated spells that you can use to build custom decks and go head to head against other players. Each spell is also a page in a living story book that translates itself and reveals its secrets as you play the game.
User reviews:
Positive (27 reviews) - 85% of the 27 user reviews for this game are positive.
Release Date: Jun 20, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We're a very small team that wanted to bring our game to Steam. The community greenlit us and we've been working hard on a build that has all of the core features intact. We could keep the game secret and keep adding secondary features until the cows come home, but the game is stable and ready to play now, so we want to make it available to players as Early Access.”

Approximately how long will this game be in Early Access?

“5-8 months”

How is the full version planned to differ from the Early Access version?

“- Graphical and performance improvements
- More in-game community features
- Better player stats & matchmaking
- More cards
- Story-telling mechanisms
- Steam trading cards
- Steam achievements”

What is the current state of the Early Access version?

“All core game features are done:
- Collect cards
- Build and save custom decks
- Find an opponent
- Play against AI
- Challenge a friend
- Unlock storybook pages”

Will the game be priced differently during and after Early Access?

“Yes. During Early Access players receive their first deck for free, and all DLC prices are lower than they will be at launch.”

How are you planning on involving the Community in your development process?

“We want as much feedback as we can get from interested players. Bug reports are invaluable, so are opinions on UI/UX improvements.

Rival Books of Aster is a complex strategy card game with a lot of rules and gameplay possibilities. Our small team has done their best to balance gameplay across over 200 planned cards, but we need player volume to help show us where we could be doing better. We will stay actively involved with our players and listen to game balance feedback, pushing updates to cards roughly every week.”
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Recent updates View all (7)

July 15

RBA - Major Update

Hi all,

We are happy to announce the release of a major update for Rival Books of Aster! Our devs have been hard at work implementing new features and bug fixes which will be outlined in detail below. We have been listening to everyone who has been participating in our early access and today’s update will address many of the concerns and wants of the community. While early access is still a work in progress, we think that today’s release is a big step forward fowards for the team and hopefully for you, the players.

New features


We have added an in-game currency to RBA that will allow you to purchase cosmetic items for your account. Open up the chronicles and navigate to your favourite card to see the options for purchase. Each win will award you 10 Ora. Win streaks of 3 will net you 20 Ora, Win streaks of 5 will get you 30 Ora, and 10 in a row will get you 40 Ora. We think that this will give those of you who need it motivation to keep banging out those wins on the battlefield. As a gift to all of our early adopters we have convinced Clauneck to give each of you 200 Ora to spend as you please.

Ora Unlockables

For now, you can spend your Ora unlocking the flavour text for each card in the chronicles and to purchase custom Avatars of your favourite cards. These Avatars will be displayed on the game board instead of the house sigil of the deck your are playing. We have plans to expand the available unlockables as early access moves forward, so stay tuned.

Additional features

These additional features came directly from you, the players. We have tried to address as many of your concerns as possible and will continue to do so as we keep pushing on.

Added tooltip to list view in deck builder
Leaderboard now scrolls to your own position automatically
Cards in deck builder are larger
Cards in hand now have a particle effect to show which ones you can afford
Show recently played users in Steam
Added more information to the choose starting deck screen
Queued attacks and cards played from hand now animate immediately
End turn button now animates immediately
More control over music and sound effect volume
Changed texture compression settings and reduced build size
Various animation timing tweaks

Bugs fixed:

Fixed the Snare tooltip showing incorrect information
Fixed an issue where opponent simula would sometimes overlap
Fixed an issue where deck builder would get stuck in loading state after deleting a deck
Fixed an issue where deck builder ink sliders would get stuck
Replaced drag to attack sound effect
Fixed certain red simula showing as black in the chronicles
Fixed issues with tutorial sometimes getting messages out of order
Tooltips in hand and on board are bigger
Text on cards in hand is easier to read

We still want feedback from all of you on these changes and any others that you would like to see. Thanks for being part of early access on Rival Books of Aster, now go get yourself some Ora.

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June 27


Well, early access launch week has been exciting for us here on the Rival Books team, and we are so glad that you could share it with us. First off, thank you all for participating both by downloading and playing the game, and also for posting your bug reports, questions, and suggestions in the community forums on Steam. We could hardly ask for a better launch week response. We have tried to answer as many of your posts as possible and will continue to answer them individually as best we can. We have been listening closely and we want to address a few specific points that seem to be a concern for most players.

Many of you have reached out to us about the size of cards in hand and the font size on the card themselves. We have addressed both issues and will be pushing fixes for this to the main game as soon as they are fully tested.

We recognize that motivation for players to keep playing and grinding out wins is important. We hear you loud and clear: achievements, milestones, and rewards that offer a feeling of progression are an absolute necessity. We are currently working on this:

Currency & Unlockables
In an upcoming update, we will be introducing an in-game currency to help reward you for playing. Every time you win a game, you will earn a little bit of this currency, and win streaks will award you bonus multipliers that earn you even more. At first, this currency will only be usable to unlock the bonus “flavour” text for cards in the Chronicles, but we have plans to quickly expand purchasable items to include player avatars and alternate game boards to start offering areas of customization within the game.

Beyond this first set of unlockables, the sky's the limit for this new currency. We have a few other things in the works that we want to offer you, but it’s too early to talk about what those are just yet. We will be ramping these additions up slowly as these are going to take quite a bit of work. We would love to hear from you on the message boards about other types of things you would like to see.

We’re also actively working on new features to make the leaderboard more rewarding. We know that as the player base grows, it needs to evolve into something more than just a single ranked list. It was never our intent for it to be just that, but the more interesting features are not quite there yet. It’s too early to give more details, but rest assured, we will tell you more as soon as we can.

Below is a collected list of fixes that we have made in the past week. Our awesome devs have been hard at work and we will continue to tweak and fix as many things as we can, as fast as we can.

None of this would have been possible without YOU taking a chance by downloading and playing a completely unknown early access title and then taking the time to send us your feedback and thoughts. We hope that you stick with us for the rest of this journey and that we can deliver a product that lives up to your expectations.

  • Critical fixes for touchscreen devices
  • Critical fix for users behind certain proxies
  • Fixed portal animation
  • Fixed issue where certain yellow simula were missing art in certain views
  • Fix issue where players were shown to take damage at the start of tutorials
  • Fixed house avatars not showing correct house
  • Reduced likelihood of tutorial steps getting out of order
  • Opponent hand count no longer goes negative
  • DLC purchase callbacks
  • Show timer for targeted EOT popup
  • Compressed some textures and slightly reduced build size
  • Speed up time between mulligans and turn start
  • Shorten start / end turn animations
  • Moved loading screen version info to bottom left so it’s not hidden by steam overlay popup
  • Removed the word “drag” from targeted EOT popup
  • Faster load time for deck builder
  • For streamers: action feed outputs to text files, so it can be used as an overlay in stream
  • For streamers: app title changes depending on which scene the game is in (Windows only)
  • Added burnt edges to all cards
Currently in open-beta:
  • Bigger tooltip in hand
  • Sharper combo effect text at all sizes
  • Don’t cover snare with spell tooltip
  • Tooltip in deck builder (big view)
  • Fixed issue where certain red simula were showing as black in the Chronicles
Coming Next:
  • Currency for unlockables (story and cosmetic items)
  • Game balance
  • Larger text!
  • Track recently played-against users so you can add them as friends or challenge them

Thanks for reading and we hope to see you on the plains of Aster!

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About This Game

Rival Books of Aster is a strategy card game that features over 140 hand illustrated spells that you can use to build custom decks and go head to head against other players. Each spell is also a page in a living story book that translates itself and reveals its secrets as you play the game.

Rival Books of Aster does NOT contain randomized booster packs. Play for free with a starter deck of your choice, and expand your collection with DLC packs containing known-quantities of cards.

Can you decipher the Rival Books to save your household and rule the plane of Aster?

- Full training levels (or you can jump right in and play)
- An easy to use deck-builder
- Matchmaking & ranking system
- A unique take on familiar game mechanics
- 4 distinct art styles by award winning artists
- Over 140 different spells & characters (with 60+ more coming soon!)
- Endless gameplay possibilities
- AI opponents to battle any time

System Requirements

Mac OS X
    • OS: 10
    • Memory: 1 GB RAM
    • DirectX: Version 9.0
    • Storage: 500 MB available space
    • DirectX: Version 12
    • OS: 10.8
    • Memory: 1 GB RAM
    • Storage: 500 MB available space
    • OS: 10.10
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