Add Astra

Add Astra

Coincidence · 2024 · Education, Racing, Aliens, Sci-fi, Space

PC
Positive100% · 14
Best price
$2.99
lowest tracked $1.49
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Steam
Steam
Standard Edition · Steam
$2.99
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About Add Astra

You’re the best arithmetech racer on Earth. But what about everywhere else?

Add Astra is a math game about racing, and a racing game about math, developed by Coincidence. We made it for a client to include in their elementary school math curriculum, but they have graciously agreed to also let us release it on Steam.
  • Rev up your very own math-pod, powered by addition, subtraction, and multiplication!
  • Adjust the difficulty by playing with whole numbers, fractions, or decimals!
  • Master ten tracks across five galaxy-spanning locations!
  • See many, if not most, numbers!

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 11, 2025
Best Zachtronics/Coincidence game because it is the only one I am (barely) smart enough to play
11 found this helpful
Recommended Jul 18, 2025
Good polish. Well designed. Good amount of math even for adults. Fractions and decimals have a good difficulty curve.
4 found this helpful
Recommended Jul 3, 2026
So, I waited a long time to buy and play this Zach game, but it's absolutely lovely. Yes, it's a game for kids to learn arithmetic, but the gameplay is tight enough to be enjoyable. Beyond the simple arithmetic, you need to make strategic [b]choices[/b] - is taking a shortcut worth it, is getting a multiplier important enough to sacrifice a turn - and this keeps the game [b]interesting and fun[/b] at any age. The game is short but, given its price, I give it a [b]full thumbs up[/b]. Oh, and, I'm sorry to say - but playing this did refresh my mental arithmetic. Given our general reliance on calculators, a small number-crunching exercise might be useful.
1 found this helpful
Recommended May 31, 2026
My seven year old son and I love this game. We appreciate that it is not timed so we can take our time figuring out each step of the way. Right now, this game has three sections (whole numbers, fractions, and decimals). Each section has ten different tracks/challenges. I would love to see more educational math games like this.
1 found this helpful
Recommended Feb 14, 2026
I tried most of the Zachtronics games in the last 5 years and haven't managed to finish any yet, but this game gave me hope!
1 found this helpful
Recommended Apr 11, 2026
Very good math game for kids, not a ton of replayability, but very worth the money.

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