Salem vs The Blockheads
Salem
Salem is an old-school and somewhat obscure (but fun) sandbox MMORPG that unlike Wurm Online has a stronger emphasis on its in-depth crafting system and survival aspect rather than building.Similar to Wurm Online though, Salem is not a voxel-based game, but you are still able to mold the game environment through resource gathering, mining and digging in a way that reminds me of the currently-shelved MMORPG, EverQuest Next: Landmark. Of course, although not exactly the focus of the game, you can still build your homestead and the process is quite similar to Wurm Online except that it occurs at a much higher speed.
Not to mention, the game world in Salem is simply humongous to the point where it feels like an actual world. Salem also borrowed some features from ArcheAge where open-world PvP is the norm, so you'll need to be vigilant at all times, but players who kill and steal for no reason will be labelled as criminals and can be punished.
However, as good as it is despite being an indie MMO and all, Salem does have its fair share of flaws due to its low development budget. So, we'd recommend you to take a look at Salem without carrying along any high expectations. It's a pretty good MMORPG like Minecraft, but if you're expecting a Minecraft clone, you may end up disappointing yourself.
The Blockheads
The Blockheads is the game to play if you want to play a sandbox/survival game that's almost the same as Minecraft but with a whole lot more crafting.Featuring an isometric 2D look, the Blockheads is a game where you can venture off into the world to explore and possibly discover hidden treasures. You can also collect blocks, craft, and build almost everything you can see in the game through the game's many upgradable workbenches. The game even allows you to go fishing and open a shop so you can sell your wares. However, like Minecraft, there are dangers lurking at every corner so you may need to be vigilant and get a weapon as soon as you can.
Interestingly, unlike Minecraft, you actually need to take care of your Blockhead. This means making sure he or she gets enough rest or they will perform the actions you ask of them at a much slower speed. There are also hunger and happiness levels so be sure you keep an eye on that.