Yom Kippur is a wargame about the 4th Israelo-Palestinian conflict: the 6th of October 1973, during the Yom Kippur day and also during the Ramadan, a combined attack was launched by the Egyptian army, coming through the Suez canal in the south, and the Syrian army, coming through Golan heights, in the north of Israel.
The game includes basic rules, around Suez canal and advanced rules, with 2 maps and more complex aircraft managements rules. The 2 maps are in 3D. The smaller map represents the area around Golan heights: the frontier region between Israel, Lebanon, Syria and Jordania. The Jourdain river cross the map from North to South, with the Galilean see well visible in the middle. The big map represents the area around the Suez Channel.
The basic game is only played on the Sinai map. Each turn corresponds to 2 days and is subdivided into 10 phases. First plays the Egyptian player. Takeing 4 phases. Then the Israeli player takes 6 phases. During each phase players can move theiir units an amount of hexagones. Combat takes place, using a calculation based on the number of units a player has.
The advanced game is played on the 2 maps by 2 3 or 4 players. The aircraft are divided into 3 categories: bombing, intercepting, bombing fighter. The aircraft combat rules are introduced. Each turn is divided into 9 phases. Arabian turn has 4 phases and the Israeli 5.
The victory is calculated using a rating:
- for Israel, 20 points if Damas is occupied, 5 points for any other Syrian city occupied, 2 points for each intact bunker, 1 point for each reduced bunker, 5 points for each unit standing west of the Channel, 2 points for each Egyptian bridge destroyed
- for the Arabs, 10 points for each Israeli city occupied, 2 points if the Syrian bunker remains intact, 10 points for each controlled pass, 1 point for each unit exiting along the coast road to Israel 1 point for each Israel unit eliminated. If less than 16 units are standing east of the Channel, the player has to remove (16 - number of unit) to the score.