I haven’t played Minecraft but am aware of it, so would look at the following assets from the store:
- Cubiquity Voxel Engine : Free
- Voxel Blocks Pack : $15
- Moenen Voxel Model Collection - Props : $9.99
- Moenen Voxel Model Collection - Character : $9.99
- Moenen Voxel Model Collection - Vegetation : $9.99
- Ambient & Environment SFX Pro : $10
- 8-Bit Diversity Collection : $10
- Shape FX Particle Systems : $15
- GUI Kit Matt Metal : $10
- DOTween : Free
- RAIN AI for Unity : Free
The above should cover: the engine; characters, props and environment; sound FX; GUI style and animation; NPC control. Player character control and interaction would need to be developed, as would the UI functionality.