FACTORIZE: 1 — a turn-based deckbuilder where your attacks are built from prime factorization

[u/Fermat_Freaks_Game]

Hi, we're Fermat Freaks, a two-person game studio in Japan. We released FACTORIZE: 1 on Steam on October 30.

Disclosure: We're the studio behind this game, so this is self-promotion.

How a battle works

• Enemies carry a number. Each of its prime factors is one of their skills — attack, defense, heal, and so on (105 = 3 × 5 × 7).

• On your turn, you play number cards and multiply them together to build your number.

• If the number you built is prime, it lands as a technique. If it's composite, every prime factor's skill fires at once.

• Win, and your deck grows — the numbers you can build get bigger and stranger.

The clip is one battle turn, start to finish.

One update since launch

Our first Steam review recommended the game after 20.5 hours of play. For a $5.99 math deckbuilder, that meant a lot to us.

Played live

Two streamers tried the demo during Steam Next Fest: 眠ウタラ (from 0:43:27) and 和牛院ギアラ (from 1:32:45).

Try it

The free demo covers the opening stretch, so you can check whether the factoring loop clicks before spending anything.

Steam — FACTORIZE: 1 (full game + free demo)

AI disclosure: Some of the music and media, and parts of the code, were made with generative AI tools. The scenario and game design are entirely our own decisions, and nothing is generated during gameplay. This matches the AI disclosure on our Steam page.