This month marks the 15-year anniversary of The Creative Assembly’s Total War strategy series, and to celebrate, the company is doing several things. This includes re-releasing the oldest games in the series on Steam, discounting most of the franchise, and allowing six games to be played for free this weekend.

The Gold editions of both Shogun: Total War and Medieval: Total War, the first two Total War games, are now available on Steam for $10 each. According to The Creative Assembly, this marks the first time they’ve appeared on the platform, and both are compatible with modern resolutions.

Total War: Attila

If you’re looking for something more modern, you can play the most recent games in the series for free from now until Sunday, June 28, at 10 AM Pacific. The full list includes:

• Total War: Attila
• Total War: Rome II
• Total War: Shogun 2
• Total War: Shogun 2 – Fall of the Samurai
• Empire: Total War
• Napoleon: Total War
• Medieval II: Total War

Should you want to keep playing beyond this weekend, discounts are being offered on Steam for almost every Total War game and their respective DLC. This includes Attila, released this past February, which can be had for $15.

One thing that isn’t featured in the sale is The Last Roman expansion pack for Attila, which makes its debut today. In addition to this, Attila has received some new, free DLC consisting of a new faction and historical battle.

A number of other Total War games are currently in development, including Total War: Warhammer, Total War: Arena, and Total War Battles: Kingdom.