Block Story vs Salem
Block Story
Block Story allows you to truly enjoy an adventure of a lifetime as you set off on your noble quest to save the world by combining the popular sandbox/exploration genre with elements from an RPG.Complete a variety of quests, explore and discover wonderful new biomes, build strongholds to stake your claim on a piece of land, mine for materials to craft and/or upgrade your gear, and even battle challenging boss monsters for a chance at some glory and fame. You can also set up your own farm as well as tame and ride on the backs of magnificent creatures, including a ferocious dragon.
Not to mention, unlike its Steam/PC version, Block Story is free for your mobile! Yes, there may be some waiting time involved, ads and even in-game purchases, but all of these are just some of the things the developers have to add in just so we could enjoy the game for free. Of course, if you decide that you love the game and would like to show your support, you could always buy the full game.
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.