Its an MMO, not fantasy, not war, its actually kind of neutral. Its set in the future. but best of all, its free.
https://www.project-entropia.com/Index.ajp
I played it in the summer and I didnt like it much, but its alot better now and I was playing all day today.
You pay for things in game with real money. meaning you convert money (from a credit card or PayPal account) into the game currency (1 USD = 10 PED) so basically you can put in 50 bucks, and if you mine/hunt alot, you can end up coming out with more money then you had in the first place.
edit: also, weapons dont cost alot, like 300 USD, the cheapest assault rifle is 14 PED, which converts to $1.40