To host a game, just enter /zestygames and click the links in the chat.
As part of this Free Hosting Weekend you will be able to host the following games:
BridgeWars

CryptWars
Cuberunner

Spleef
Words with Zedlings!
Find out more about the ZestyGames on our wiki: https://zedwork.co.uk/wiki/ZestyGames