Recs.
Updated
Minecraft is an indie sandbox video game based around building structures in a voxel based world. Contained within is a survival mode, as well as a free play build mode.
SpecsUpdate
Pros
Pro Amazing extended community
The community surrounding this game is huge due to its popularity. There are lots of servers and projects revolving around it that allow for so many different choices in how one wants to play and who they want to play with. From crafting guides/videos, themed servers and YouTube play sessions, there is enough out there to help one find what they are looking for.
Pro Enthralling, unpredictable gameplay
Exploring and fighting expands on what is a randomly generated world, never knowing what's going to happen next or what the player will find. There are no set goals and no end to reach: it is all a sandbox experience that the player formulates as they go along, making it all the more thrilling.