The last way to join a specific Roblox game is if players have friends playing in that server. They are able to join any friend's game if they have the "Join In-game" setting enabled.

CREATE your own game and share it with others to play using Roblox. This is our step-by-step guide on how to create you own Roblox Game and how to engage it with users too. How to Make a Roblox Gam… ...

If you can't join or load a game in Roblox on your Windows PC, Android phone or iPhone, here are the steps to take to fix the issue.