CryptoZombies Solidity Course
Free interactive Solidity course where you write smart contracts in the browser to build a zombie game.
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CryptoZombies key facts
| Category | Web3 education |
|---|---|
| Platforms | Web |
| Pricing | Free |
| Company | Loom Network |
| US availability | Available: terms name no country restrictions |
What is CryptoZombies?
CryptoZombies is a free, interactive Solidity course that teaches smart contracts by having you build a zombie game in the browser. Its homepage states everything is completely free and reports over 400k registered users. The lesson repository says contributors assign copyright to Loom Network, and it holds lesson folders for 16 languages, English included.
How CryptoZombies works
Each lesson runs in your browser.
You write Solidity step by step, and the homepage says the path takes you from the very basics to a fully functional blockchain-based game. Lesson 1 is designed to be finished in one sitting, and by its end you have written your first contract.
The game theme is the teaching device. You write the contracts for a crypto-collectibles game, a zombie army. After you finish all lessons and deploy your DApp, the site says your zombies can battle other players' zombies. The curriculum today is mostly Ethereum and Solidity, as the homepage itself states.
Lesson text lives in a public GitHub repository, with the English source in an en folder split by lesson number. Community translators add a locale folder and open a pull request against master, and every contribution assigns copyright to Loom Network.
How to start with CryptoZombies
- You need only a browser: click Start Course on the homepage and pick a language.
- The lessons are completed in the in-browser editor, so you can start without installing a toolchain.
- Plan on one sitting for Lesson 1.
- Read the roadmap on the homepage with care.
- It still lists 2022 and 2023 plans such as a CZ token on BNB Chain, token bridges and a jobs board, and the latest blog post shown there is dated May 5, 2023.
- Check what is live before you count on those features.
Risks to know before using CryptoZombies
- Parts of the site look unmaintained: the homepage footer reads Copyright 2022, and the newest video listed dates from September 2023.
- Solidity and its tooling have changed since then, so pair the lessons with the current Solidity docs before you deploy anything real.
- The homepage describes a planned play-to-earn token that would be bought back and burned when users pay for courses.
- No contract address or launch date appears on that page, so treat any token claiming to be CryptoZombies with suspicion.
CryptoZombies alternatives
Other projects people compare with CryptoZombies.
Free video courses from the audit firm Cyfrin on Solidity, Foundry, DeFi and smart contract security.
Developer portal funded by the Ethereum Foundation, with docs, community tutorials and links to free courses.
Solana's official developer hub with docs, a video bootcamp and a free in-browser Solana Playground.
BuidlGuidl's set of build-and-submit Ethereum challenges using Scaffold-ETH 2, from tokens to ZK voting.
Free online school from Alchemy with in-browser courses on blockchain basics, JavaScript, Solidity and Ethereum.
Where CryptoZombies ranks on DappAtlas
CryptoZombies pros and cons
- Completely free, per its homepage
- Lessons translated into 17+ languages in its public repository
- Short game-style lessons suit someone with no coding background
- Lesson content is not under an open-source license: contributors assign copyright to Loom Network
- Covers Solidity basics; no course on current tooling such as Foundry is shown on its homepage
CryptoZombies FAQ
What is CryptoZombies?
CryptoZombies is a free, interactive Solidity course that teaches smart contracts by having you build a zombie game in the browser. Its homepage states everything is completely free and reports over 400k registered users. The lesson repository says contributors assign copyright to Loom Network, and it holds lesson folders for 16 languages, English included.
How much does CryptoZombies cost?
Free, according to CryptoZombies’s own page (checked Sep 26, 2026).
Is CryptoZombies available in the US?
Available: terms name no country restrictions, according to CryptoZombies’s own page (checked Sep 26, 2026).
Sources
How this page works
Sources: CryptoZombies: official site, CryptoZombies: Lesson repository license, CryptoZombies: Terms. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.