# CTF: Ethernaut

## What is Ethernaut?

[Ethernaut](https://ethernaut.openzeppelin.com/) is an open-source capture-the-flag (CTF) game by the Openzeppelin Team to help improve smart contract development or security. The game is played on the Ethereum-Virtual-Machine (EVM); each level consists of a smart contract to be hacked. At the time of writing, there are 27 levels, level 0 to level 26, of varying difficulty.

![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1657460575507/HcnhOfyuZ.png align="left")

## Why this article?

Over the next few weeks, I'll be updating this post with a walkthrough of each level as I make progress.