• Persistent: game progress is stored on a server and you can continue at any time from anywhere
• Browser-Based: no downloads needed, fully playable inside a browser window
• Game: clearly it should be a game - otherwise Twitter would be a PBBG

Something like Melvor Idle (a local game with cloud save option) would also fall under PBBG; should it? Does a PBBG need coop/multiplayer features (everyone playing in the same world)? I think it's more fun for everyone to keep the definition broad.

I'm glad you brought this up! Imo, Melvor Idle is a PBBG because persistence doesn't necessarily have to be external.

Multiplayer has been kind of hit or miss, some people are adamant that it is required, other's aren't.

For the last jam we had Cooperation as one of the criteria but there wasn't enough time to bring it in so everybody scored really low on it. So maybe we can just ignore that portion in favor of time?