Amount of players: 1+
The idea behind this game is to get the highest score without exceeding 21. If you are playing using one device, it’s you against the app, and you have to get a better score than the dealer. If you exceed 21, or the dealer gets a higher score than you, you have lost and therefore you have to drink. However, if you are playing online, you are playing against the other players in the lobby you are joined and not a specific dealer. The same philosophy applies here as well, get the highest score among the other players and not exceed 21. The player that gets the best score has won, and does not have to drink while all the other players have to take a sip.