Code.org provides free computer science activities and lessons, in particular interactive puzzles and games. It is used by millions of students globally from young to old, and some of the activities are translated in over 45 languages.
Civilization is perhaps the most well-known example of a fun game used widely for educational purposes (rather than the other way around, an educational game with fun elements). Civilization II download option 1 Civilization II download option 2 Wikipedia
The Incredible Machine is a very popular puzzle game from the 1990s that tests your engineering skills and ingenuity. Solve "machine puzzles" through inventive use of different objects to achieve a simple task.
The fourth game in Sierra’s famous King’s Quest series, released in 1988, is the very first adventure game with a female protagonist (hero). It is also one of the first games with a female hero across any game genre. The role taken on by the player is that of Princess Rosella, daughter of King Graham...
