Downfall was initially made in 1970 by MB games. It is a 2 player game that promotes forward thinking and planning.
Each player sits either side of a vertical board and both players have ten discs, either red or green with numbers on them. The aim of the game is to get all of your discs to the bottom of the board first by turning the cogs, however the other player is not allowed to turn the other players last cogs.
Players have to plan ahead to ensure that they do not become trapped by the other player or their own discs are not taken out of order by the other players move. It has recently been relaunched by toy giant Hasbro under the name of New Downfall with yellow and red discs.