I have not found an complete list of minecraft like games so I decided to take it upon myself to create the list for anyone who is wondering what games are out there...
Terraria - an PC game is very similar to minecraft besides the major twist... its 2D! Terraria is an adventure oriented game unlike minecraft. It has many unique features that make Terraria its own game including weapons, tools and many npc for buying and selling materials. $10 and its yours.
Minetest C55 - This game has been around since (2010) and is being developed by an guy going under the name of (Celeron55). Minetest is supposed to be the most portable and stable game for both High and Low Ended machines. Machines that cannot handle minecraft will be able to play Minetest perfectly. And it is completely free
Infiniminer - Is known for its "Originality" and is what originally inspired the "Minecraft" bloom. It is known as the first virtual worlds that allow players to creat and destroy objects for gathering resources. You can set traps or go head to head and kill your opponents to stop them from gathering resources for your team to win. It is Free of charge.
Manic Digger - A great alternative to Minecraft. It is very simple in many aspects and also offers many similar features that Minecraft offers. Many of Minecraft fans hate this game, as do I but that is our right of opinions. Although, this year the game is supposed to add a ton of content that could ultimately make this game a bit better than Minecraft. Who knows, it just might... It is free.
Ace of Spades - A very heavy based minecraft game with an epic twist... COMBAT! This game reminds me a lot like if a group orgy was made up of Minecraft, Team Fortress 2, Medal of Honor, Call of Duty and a few other games... Players are made up of two teams which are supposed to capture the other team's "Intel Files" (a hell of a lot like capture the flag basically) while defending your Intel There is also Team Death Match game type as well to have fun with. You are able to build and destroy structures either you or your enemy has created and use the blocks that you gather to your advantage to win. It is free and I recommend it highly!
BlockLand - Been around a while before minecraft was and still is a very popular game. The world map is set up in advanced but every structure in the game is built entirely by the players themselves. The blocks look very much like legos and can be stacked in every way possible. It offers combat, mini games and is explorable but limited at the same time.
Roblox - A free browser based game is ever increasing in popularity. It may not appeal in looks to everyone but it offers many unique features that minecraft does not, making it epicly worth your while to try out and is free to enjoy. It is focused on being social and for the creative minds around the world. All levels are created by players and can be shared with others or for you and your personal friends own enjoyment. It offers many game modes like RPG, FPS, Adventure, Racing and many other types of popular modes enjoyed by everyone. If you want the premium builders account, you will have to pay a small fee but only offers a few extra features that are not really worth the payed account.
Cubelands - In a sense a direct competitor to Minecraft in many ways, offers features strictly for building purposes and less on the mining aspect of minecraft. Cubelands is an free to play game that is accessed through the browser and is available for both PC and MAC. It is updated on a regular basis making it an dangerous competitor to minecraft and is focused on being multiplayer only. The interface is a lot cleaner as well than minecraft.
King Arthur's Gold - Another 2D side scrolling version of minecraft but a hell of a lot faster paced than Terraria and is more combat oriented while still focusing on the aspects like minecraft. It features 3 playable classes which is the Knight, an Archer and the Builder. Build a castle and defend your friends against your enemies. It is free for the most part unless you buy the premium account for $25.
Epic Inventor - An Terraria inspired game is free and is considered an epic alternative to Terraria. It offers a feel of RTS and RPG features and is an incredible and healthy mix of both game types. There are buildings that help out with the gathering process of resources and offers a wide variety of defensive buildings to ward off enemies.
Clong Series - Clong is a game very similar to Epic Inventor. It is a healthy mixture of Terraria with an RTS like age of empires, ect with its features offered to players. The game requires you to advance your race of people as far as possible with mining resources. It has 3 different versions, free being 2d with basic features, $15 which offers full features and buildings and the third is a 3D version of the game which will most likely be $20 or $25 and will be epic. I recommend this game.
Cortex Command - A game very seriously based on an RTS like feeling, allows you to control multiple bodies in a world either randomly generated, already created or built by you to explore. It is very addictive and allows for a ton of combat action while mining gold to build your buildings and forces. It also features great physics.
Mythruna - Not released yet but still very playable in its Pre-Alpha tests. This game is almost identical to minecraft but looks beautiful, even better with its graphics. The HD texture packs offered by minecraft devs dont even look as good as the graphics in this game does. Currently in development are the tools and water flow functionality as well as its mod support. It will be heavily based on multiplayer but offers a single player options to play with. The features to me that stand out even more is the Slopes that you can add instead of stairs and roofing materials like shingles, ect. For now it is free but will add an option to buy once it goes into alpha.
Total Miner - an minecraft like game for xbox. It offers players two different modes like Infinite creativity mode and dig deep mode which allows for you to explore cave systems and allows you to kill monsters while looking for treasure. it is currently $3 on the market.
Fortress Craft - Another game for Xbox that looks very similar to Mythruna graphic wise. The only difference to all the other games mentioned is that it offers Runes to collect to unlock items to use. And is has less materials to build with but more materials for effects. Also, the water is glitched and if you dont block it off, it keeps flowing and covers the map infinitly. I dont recommend it to anyone. Available for $3
Eden: World Builder - Basically is minecraft for your iOS device such as Iphone and Ipad. It is limited in many ways but gives you infinite resources to build with. Mining however is not a feature of this game. You can however share creations easily with your friends of the Eden World. It is currently available for $1 on the market place.
Survivalcraft - Is another clone just like Even: World Builder except for the Windows Phones. It however offers you a story line that starts you out on an island all because you were abandoned by your ship mates. It offers every feature of minecraft except for the random generated greatness that minecraft and other clones offer. The worlds feel very limited in generation at the beginning. Available for $2.99
Worldcrafter - A very poor graphic representation of Terraria. Has a very unoriginal feel as it offers basically every feature of all the minecraft clones combined in a side scrolling environment. It has received random mixture of good and bad comments on the game release site.
Brick Force - A free to play game, currently in beta. This game is great for people who likes the action oriented feel of Minecraft clones with the ability to create your own maps for in game fun. It has a mini store to buy guns, clothing, accessories, ect to customize your player's look as well as stats to increase your skill levels. You rank up like in most popular mmo games. It has an very original feel to the game is is highly recommended by me to play. Is free.
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I'm here, I have no life and I play Minecraft... What else do you wanna know?
Err, Roblox, no... just no... their community has turned crazy... It used to be an awesome game in 2008, but now it sucks...
yes i agree i watched Roblox evolve before my eyes....from 2007 to 2012, it started gettting better, and better then by 2009 it just started plummeting in quality
I'm pretty sure it's in closed beta.
I'm pretty sure it's closed, heard that it was from a friend who has it.
I do stuff and stuff.
don't expect me to be on much.
i know because i used to use it [the forums mostly]