Have you ever played Agar? Good, then you know how to play SteemAgar, the only difference is that winner gets rewarded with upvotes. You can join the game here - https://steemagar.herokuapp.com/ - This is still in beta so minor bugs could occur

How SteemAgar works?

There is a new match announcement post every 1 hour from this account, @anonfolderall - Once announcement post has been made, it takes 6 minutes and 30 seconds for the game to start so you have some time to get ready and invite your friends to join too. It's a multiplayer game after all and you'll get more rewards for winning. Once at 6 minutes and 30 seconds, the play button will appear, be sure you're logged in using Steemconnect. Steemagar doesn't store your keys or send them anywhere, everything is done via Steemconnect.

How the game works?

The game itself works just like Agar. You try to grow as big as possible by eating food and other players, just remember if they are bigger than you, better run away or get eaten! The game time is limited to 420 seconds. Winner is the biggest player at the end of the game. When game time has run out, the winner will have to wait few seconds for confirmation message. You'll get notified when it's done. Everyone can then go and vote his winning comment on the game announcement post. Also consider giving a upvote for the announcement post too as a support. Winner will also get rewarded by @igster account, voting weight starts at 2% and every joined player increases the vote weight by 2. Invite your friends and enemies for higher rewards! But most importantly, try to have fun!