1975 AMOEBA
This is one of those games that is way more fun to play than you would ever have thought just by looking at it. There are 49 plastic tiles placed into a seven-by-seven grid and each tile is embossed with the same pattern of two quarter-circles in opposing corners. these tiles allow for a great variety of patterns to be made by simply rotating pieces by 90 degrees. As the pieces are symmetrical the direction of rotation makes no diTherence to the outcome and the pattern will always connect up with the pieces next to it.