Rust in its most primitive form is Minecraft meets DayZ, yet can be so much more, The only aim in Rust is to survive.
To do this you will need to overcome struggles such as hunger, thirst and cold. Build a fire. Build a shelter. Kill animals for meat. Protect yourself from other players. Create alliances with other players and together form a town.
Steam Store page -
http://store.steampowered.com/app/252490/Whatever it takes to survive.