Crusader Kings is described as 'A grand strategy game' and is a Historical Game Game in the Games category. There are nine games similar to Crusader Kings for a variety of platforms, including Windows, Linux, Mac, Steam and Online / Web-based. Most alternatives are Historical Game and RTS Games. The best alternative is Civilization. It's not free, so if you're looking for a free alternative, you could try FreeCiv or C-evo. Other Crusader Kings like games are Europa Universalis (Paid), Total War (Paid), Hearts of Iron (Paid) and Imperial Domination (Free).
Freeciv is an open-source, turn-based strategy game based on Civilization II. Inspired by the history of human civilization, the game commences in prehistory and your mission is to lead your tribe from the stone age to the space age...
Total war is a turn based/ RTS strategy game, you play in different historical battles. Total War: Attila and Medieval II: Total War is also avariable for Linux. Represent entire series of Total War games.
Victory is at your fingertips! Your ability to lead your nation is your supreme weapon, the strategy game Hearts of Iron IV lets you take command of any nation in World War II; the most engaging conflict in world history. Represent entire series of Hearts of Iron games.
Imperial Domination II is a turn-based strategy game, set after the conquests of Alexander the Great and before the rise of the Romans. Expand your empire by trade, diplomacy, knowledge or just brute force. It's up to your to decide the fate of Europe. Represent entire series of Imperial Domination games.
"Command armies, manage resources, and build an empire in this real-time strategy wargame from Longbow Games. Will Rome fulfil its destiny to rule the ancient world or will history be rewritten to forge a new Etruscan, Gallic, or Greek hegemony! " Represent entire series of Hegemony games.