does anyone know any free game engines that i could make a survival multiplayer game with looting and doesn't need good graphics so far i have not found any
survival games
What do you mean by "doesn't need good graphics"? If you mean a simple 2D engine there are plenty, such as Cocos2D, Game Maker, and even simple SDL (I've never seen any 2D survival games though o.o). If you mean an engine that can put out nice-looking 3D environments without you being good at graphics, that's a bit of a pipe dream I'm afraid.
EDIT: I should add that supporting multiplayer isn't exactly trivial in most cases, and an engine isn't going to be able to help you much in that regard. Networking is something that you can only abstract away so much.
Unity is fairly easy to use. It does require some knowledge of scripting in c#, and has multiplayer/networking functionality.
Keep in mind that networking requires servers, which could become a problem if you plan on publishing the game.
I would second Unity as a great and relatively easy to use engine. And it's completely free. I'm not sure what experience you have, but networking will require at the least servers and a good amount of experience. Are you just starting out?
2D:
Scirra Construct 2 (free - about $500 in price)
-uses an event system instead of code
Game Maker Studio (free - about $800 in price)
-is best used with a custom, built-in language called "GML"
3D:
Unity (free - $1500+ in price)