Games have changed a lot over the last 25 years. Technologies have improved, tastes have changed, whole new genres have been created. But in that time, some games have shown that classics are classics for a good reason.

Sid Meier’s Civilization is one of those games. The turn-based strategy classic has sold over 35 million worldwide since its creation, building an global community of players. Its latest chapter, Civilization VI, is as big a hit as ever, earning over 25,000 reviews on Steam, along with 15 E3 Awards, including Best PC Game and Best Strategy Game. That’s a lot of staying power for a franchise that launched 25 years ago. So there’s something about the balance of global strategy and specific focus on diplomacy, culture, and strategy is timeless in its appeal to gamers. In Civilization VI, those basic mechanisms get new depth and rich visual sheen, with the option to cooperate or compete with your friends in a variety of scenarios. It’s still crazy fun after all these years.

Buy now: Get Civilization VI for $18 when you use the coupon code–CIVIL40 at checkout. That’s 70 percent off the usual price.