SlothNinja Games is a play-by-web (PBW) site that permits registered members to play boardgames with other members via the Internet, in a turn-based manner. In particular, the site provides a graphical interface where players can see the current game state and execute their actions. The site keeps track of the game state, enforces legal moves, and sends optional email notifications to players when it is their turn to move. People need to be registered in order to play. Registration is free, but requires a Google Account.

As a result of the PBW nature of the site, games typically take days, weeks, or even months to complete depending on how frequently players take their turns. If you are expecting to play an Open Game to completion in one sitting, you are likely to be disappointed. While the site does not enforce any time limits, games that are inactive for more 30 days will be marked as abandoned. Moreover, there is a general expectation among the community that players will make at least one move each day. If you plan to consistently take longer than a day per move, I suggest creating a game and clearly indicating your desired playing speed in the title.