Moomoo.io vs Starve.io
Moomoo.io
Moomoo.io follows the incredibly simplistic style used in most IO games, but its gameplay is quite different from what you'd expect. Unlike having a similar gameplay to games like Slither.io or Agar.io, this game is more of a strategy game where you move around the map collecting resources to build a village of your own. You can then construct windmills to generate gold for you to use, but you'll have to defend your windmills from hostile players... which are everywhere on the map frankly.It's a pretty intense multiplayer game, but it definitely brings a new form of gameplay to the iconic IO games genre. If you're interested to try it out, you can do so for free straight from your browser.
Starve.io
Starve.io is a unique IO game mainly because it is more of a base-building and survival game rather than just a hack-and-slash arena. In this game, you will need to collect resources and turn them into useful items which will marginally improve your chances of survival. The crafting aspect of the game is very much simplified but it can still take you a while to figure out crucial crafting details like how much resources you need to create a certain item. Also, a quick tip if you will - grab as much food and wood as you can at the get-go.As a survival game, there are several important "meters" that you will need to keep an eye on, such as temperature and hydration. Hunger also something that you will need to frequently deal with, aside from other potentially hostile players as well as other monsters like vampires and zombies if you happen to play its other game modes. There is even a "hunger games" version which frankly feels a lot like a battle royale game.
Unlike many other IO games where players are always pitted against one another, Starve.io is a game in which you can actually choose to coexist with other players rather than just swinging whatever weapon you have in hand at anyone you see... though, many players still do that pretty often, especially those better-equipped ones.