Atmosfear was a video casette based board game that, although not the first of its type, was nonetheless innovative when it was first produced in 1991. To play the game, each player writes their greatest fear on the reusable "nightmare" cards, which are then placed in the centre of the board. The video cassette is inserted and the players are introduced to the Gatekeeper character that appears on the television. Throughout the game, which an onscreen clock times for an hour, spooky music is played to create atmosphere, and from time to time the Gatekeeper reappears to give instructions or to test the players as they go around the board. The object of the game is to collect all six keys that relate to the player's piece and head to the centre of the board, whereupon you may face your greatest nightmare. If it is not your nightmare, you press stop on your video player and win the game. If no-one reaches the centre before the hour is up, the Gatekeeper wins the game.

The game was an instant hit in Australia where it was first produced, and was licenced to Spear's Games for the UK market in 1992. It sold over two million copies between 1991 and 1993 and several more videos were released to expand the gameplay. Declining sales led to the further expansions being halted by the mid-1990s and the replacement of home video players with DVD players by the end of the 1990s made the original game obsolete. DVD editions were released in the 2000s and the original videos can now be found on the YouTube website, meaning the early 1990s sets are once again reusable.