How to get minecraft hunger games and minigames?

I will soon get minecraft on my computer and thinking about doing hunger games or mini games like tnt run. I've been trying to find out how to do this but i don't know how. Can anyone who knows tell me please.

Do i need to download a map?
Is their mod?
Just what do i do?

When you go to the minecraft launcher, go to multiplayer, click on add server, and here are some IPs to type in (type them in the same way I typed them!):
skga.me
play.therealmmc.com
thenexusmc.net

those are the only ones i know