Minecraft - Possible Social Concept

1. A social freemium concept of the game.
2. Resources can be obtain through premium purchase.
3. Each player has a small world, owned, for building a home shelter, farms and trees
4. Player are able to co-op in caves run (different world) for rare resources.
5. Player are able to co-op in nether world run (different world) for rare resources.
6. Player are able to visit friend's world but cannot mine or take anything.
7. Player world can be expanded through achievement or use level points to exchange.
8. Player are able to co-op in various popular mod maps, these mod maps can be unlock with premium purchase.
9. Player are able to craft custom character skin. Some characters skin can be purchased as premium.
10. Player are able to adopt pets. Some pets can have different color or different skin as premium purchase.

With over 28 million registered users.
5 million of them purchased the game.
Social game concept on Facebook.
Freemium and Premium concept.

Quite a feasible business for a game.

Minecraft - Game Concept Digest Part 1

Game Concept

1. A world of cubes/blocks.
2. You could simply "mine" most of the cubes in the world.
3. By mining, you obtain resources to craft items. 
4. Some resources are limited, however there are ways to make some resources infinite.
5. Some resources is not reusable; broken when mine or degraded to other resources.
6. Build anything with the resources by placing them back to the world.
7. Character, the player, has various attribute counter
1. Health bar
2. Hunger bar
3. Oxygen bar
4. Armor bar
8. Day and Night mechanics
9. Monster will spawn at night or dark places to hunt you down. 

Usual Scenario for Game Play

1. Build a shelter to protect yourself at night
2. Hunt resources to craft armor for reduce damage from monster
3. Hunt resources to craft weapons to fight the monster
4. Build tools to mine the resources
5. Build livestock farm to reproduce resources
6. Build crops farm to reproduce resources
7. Saplings planting to regrow tree
8. Adopt a wolf pet
9. Adopt a ocelot pet
10. Enter caves to mine rare resources
11. Explore the world
12. Build railway tracks to various destination
13. Switches and circuit 
14. Nether world exploration 
15. Build defense system 
1. Murder hole
2. Quarantine monster spawn points      

Key Points

1. User are able to gather various resources and craft various items.
2. User are able to reproduce resources by means of realistic Eco-cycle.
1. Crop farming and livestock farming (Similar to HarvestMoon)
3. User are able to keep pets with beneficial protection over monster
4. User are able to play in different game mode
1. User who just want to build they world (Peace Mode or Creative Mode)
2. User who want some trills at night (Standard Mode with difficulty level)