Snafu is an arcade action game similar to the Atari game Surround. You control a constantly moving and growing wall, the goal is to trap all of your opponents before you become trapped yourself. If you crash into the borders of the screen, into another players wall, or your own wall, you are out for that round. The last player left standing wins the round! Several game options are available which allow or forbid diagonal movement, set obstacles in the playfield, allow a players wall to disappear or remain on the screen after they crash, control the speed of movement, and select the number of rounds to play. The game can be played by one or two human players, and optionally two additional computer players can be added for up to four players on the screen at a time.