Tribulation (1974)

In Tribulation, number tiles are laid out in a 7 x 7 grid, similarly to Boggle. Each tile has a number from 1 to 9 on it, but the 9 tile is also used as a 6. Number disks from 1-50 are shuffled, and one is drawn. Players race to find three tiles whose equation (first times second, plus or minus third, or any other combination of two tiles multiplied and the other added or subtracted) adds to that total. The first to do so wins the disk. Whomever has the most disks when they are all claimed wins the game.