Can you make a game with other people?

Hello, me and my friends want to make a game together, but we wanted to know, if possible, how we would be able to do it?

it’s possible, but teams are using VCS like git (github, bitbucket) to share the files but you need to see how to use it to begin .
I don’t know an extention who allow to be 2 in the editor. a Versioning Control System (VCS) is only share files.