kind of offtopic but does anyone know any similar survival game ??
With less focus on the mining and more focus on surviving (you need to eat food, drink water, sleep, etc), Stranded 2 is a pretty good survival game (http://www.stranded.unrealsoftware.de/s2_infos.php).
Now I wonder about the game around it but... is there any? is it online? can anyone explain how the official paid version works?
The paid version lets you play singleplayer survival mode (and when beta is released, multiplayer survival mode), where you have to find the resources to make tools, and build shelter from the creatures that come out at night and hunt you, but usually disappear when it's daytime. It also adds alot of buildable items like stairs, ladders, boats, minecarts, and minecart tracks to make fun inventions like rollercoasters (video on main page of http://www.minecraft.net), or just use them for exploring the maps.
At the moment, the multiplayer online appears to only be creative mode (unless you join a modified server, which could be anything from Portal to Role Playing), which is similar to the free version. However, creative mode in the paid version allows you to make items as you normally would in single player.
Also, the game is updated all the time (even now it's only 1.5 years old) and any updates or expansions come free once you own it. So although the game doesn't have a distinct goal or ending at the moment, the creator has mentioned that he would like to have some method of winning the game.
Edit: forgot to mention, paid users can also download a client to play the game in instead of just playing it in their browser.