TEFUN (pronounced TEEN-fay) is a strategy battle game that uses turn-based gameplay to simulate a battle of the minds in the form of a strategy board game. A new battle is always about to begin, but it will start as a game of hide and seek, with only one player guessing where his opponent is located in the battle bunker.

After each turn, players use a special Strategy tool to check their bunker selection and use it to their advantage. Every correct choice made by a player brings them a step closer to winning. Every wrong choice brings them closer to losing, and losing all of a player's lives before the round is over means he is out of the game.