The Internet is organized into Autonomous Systems. For the purposes of this game, each AS is roughly equivalent to an Internet Service Provider.
The goal of this game is to check in from as many ASes as possible. For each unique AS you check in from, you get 1 point. If you are the first player to check in from an AS, you get an additional point.
If you attempt to access this game from another network and you get a "Site not found" or similar error message, it is likely that network does not yet support IPv6. Please contact the ISP or network administrator where you are and ask them to enable IPv6.