It's a multiplayer board game, where, every turn, players secretly place either a mine or a flag.
If players place mines or flags on the same spot, then they have to play rock-paper-scissors to determine who gets the spot.
If a player places a flag on a spot with a mine, the spot blows up and the player that placed the flag loses health. (Losing all health causes you to sit out for the rest of the game.)
The winner is the player who has placed the most flags at the end of the game.
You can customize your avatar and play with a game of up to 16 players. There are A.I. computer players you can play against if no one else is there to play!