I am working on a new version of HackTheGame, which is I lovingly called HackTheGame Online.
The game is up and you can go here and register an account, create a server, download tools, send messages to other players, etc.
Be warned however, this game will not hold your hand and demands that you explore. There is no registration form for example. 😉
For ideas, help or just HackTheGame chat join the discord channel.