The Microsoft Entertainment Pack was a pack of simple casual games released in 1990. At the time it was one of the first Windows only PC games on the market. Microsoft Entertainment Pack: The Puzzle Collection features ten new puzzle games, designed by Alexei Pajitnov, the creator of Tetris. The puzzle games are: - Fringer - Finty Flush - Mixed Genetics - Rat Poker - Lineup - Jewel Chase - Color Collision - Charmer - Spring Weekend - Muddled Casino