# Introduction

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Chain of Legends is a play to earn NFT game that you can:

1. Buy a land, build a [CLEG token mine](https://whitepaper.chainoflegends.com/guides/buildings#cleg-token-mine) and start earning game tokens.
2. Directly sell tokens in exchanges or expand your empire by creating a [Stone mine](https://whitepaper.chainoflegends.com/guides/buildings#stone-mine) and an [Iron mine](https://whitepaper.chainoflegends.com/guides/buildings#iron-mine) to generate the resources that you need for your progress.
3. Build [barracks ](https://whitepaper.chainoflegends.com/guides/buildings#barracks)and train [troops](https://whitepaper.chainoflegends.com/guides/heroes). Explore the world, find [dungeons](https://whitepaper.chainoflegends.com/guides/adventures#dungeons), Kill monsters and collect treasuries. Troops gain experience and levels in every battle and [adventure](https://whitepaper.chainoflegends.com/guides/adventures).
4. Fight with other players to occupy [treasure island](https://whitepaper.chainoflegends.com/guides/adventures#treasure-island) and collect treasures. And defend the island you have occupied from other players' invasion. Fights are automated. Each user can use a strategy and set the formation of troops before the fight. And watch the battle replay.
5. There is a [Marketplace ](https://whitepaper.chainoflegends.com/guides/marketplace)where users can trade resources, troops and [lands](https://whitepaper.chainoflegends.com/guides/lands).
6. [Free to Play](https://whitepaper.chainoflegends.com/free-to-play): Each user can get a free mine and land with low mining speed and capacity. And also by a [referral program](https://whitepaper.chainoflegends.com/free-to-play#referral-program).