A strange little side quest
A quick detour while Checkers Classic waits for your next move: Alexey Pajitnov created Tetris in 1984 after drawing inspiration from pentomino puzzles, then simplified the idea around shapes made from four squares. It also connects to a different milestone: Space Invaders, released in 1978, helped push video games into mainstream popular culture. That gives Checkers Classic a little more company than it first appears to have.