Eykar
Eykar is a fantasy universe where history has yet to be written. An open source smartcontract dictates the rules of this world: how fast time passes, how you can move, how you can form an army, and so on. To register your address to the game, you will have to pay about 4 finney of ethereum (about 10$). This will allow you to acquire your first land. From there you can start recruiting men, to explore and conquer territory. As you expand, you will eventually meet other kingdoms. You can ally with them or start a ruthless war to gain prestige. Prestige will play a very important role, as it will define which alliance will win the game at the end of the first millennium. The alliance with the most prestige will win half of the money generated by the game. The other half will be used to pay for the updates voted by the players with the most prestige.