I wish the description of the game was more descriptive, so I'm asking a few questions here:

Is the game played on a discord server or something?

Does each player need to buy a copy or just one player? 

Thanks.

The game is played on a Discord server, yes. The pdf includes a link that gives you a server template that's already set up with needed rooms and such. Only one player needs the rules, since you post the rules in the #rules channel of your server!