Kenshi vs Wurm Online
Kenshi
Kenshi is an open world, semi-sandbox, party-based RPG that offers players an completely open-ended gameplay rather than opting to force players to go through a storyline. You can be anyone you like in this game, be it an honest trader, an adventurer, a bandit or others. Scavenge important resources, including weapons and armor, from corpses and use them for your own. Recruit new companions from towns, build an outpost of your own, and grow it to accomodate more of your companions. Of course, as your little town thrives, bandits and jealous rivals will attack you and you'll need to make sure all your people have what they need to defend the town and repel the invaders.Sounds like fun? Well, it definitely is. However, Kenshi, being a pretty ambitious early access game, does have it fair share of flaws. The game still has plenty of glitches still and can be really hard to get into, especially at the beginning of the game where you literally have no idea what you need to do.
That said, the game is very unique because it has a pretty rare theme and its gameplay - a combination of party-based survival/ base building - is also oddly rare among the other games on the market. So, you might want to check this game out.
Wurm Online
Wurm Online is a unique sandbox/adventure RPG that many has been touting as being the most realistic one ever. The game is not a solo survival game unlike Minecraft. Instead, you are given the opportunity to build your own settlement - literally from the ground up - and help it to grow. Being an MMO, you can enlist the help of other players to develop your settlement from being little more than a camp with a few shabby and lopsided huts into something that passing bandits might be eyeing hungrily at.There is also an adventure element in this game where you get to venture of into the wilderness to fight a variety of creatures to earn some loot and to level up. Players who enjoy clashing swords with their fellow players can even hop into a PvP world server to enjoy some open world PvP. That said, things will go by a bit slowly if you are playing the game alone though. Wurm Online is an MMO for a reason!
The game has nothing but a fun and great experience to offer to its players and best yet, it's free to play! You can opt for a premium membership if you like just so you can play on multiple servers but, as mentioned, the game can be enjoyed without having to spend a cent.