Shelter 2 vs Starve.io
Shelter 2
Shelter 2 is a simulation/RPG where you play as a lynx, an animal that lives out on the cold tundra and is somewhere in the middle of the food chain. In this game, you start as a pregnant lynx who's looking for a safe space to give birth and rear your cubs. You'll get to experience parenthood from the perspective of an animal and the experience can be pretty immersive thanks to the many maternal and hunting features available, including calling the cubs to move closer to you and smelling the air for any prey nearby. The game is a lot richer in terms of its diversity than the original game as well, and you'll get access to a lot more movements and jumps, giving you the range of movements you'd come to expect for a graceful animal like the lynx.Although the graphics here may be an acquired taste, Shelter 2 is still a masterpiece of a game and is definitely the sort of game you'll want to play if you love playing animal games where you're placed in the paws of said animal.
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.