DWARF FORTRESS

Dwarf Fortress is a colony builder game that with time evolved into a roguelike adventure game. There are three game modes now:

Fortress mode - concentrates on a construction and management gameplay, you build a colony of dwarves inside a mountain. This is a typical colony builder option with no objectives, the ultimate goal is to survive as long as you can while everything around you is trying to kill off your inhabitants.

Adventure mode - a turn-based, open-ended roguelike mode, where the player starts off as an adventurer and sets out into the randomly generated world.

Legends mode - sort-of bridge between the other two modes, players can view maps and histories of each civilization built within the world and figure who has lived or died in this reality.

The game started just with ASCII symbols representing each element of the world, with time it has improves into colours and simple graphics, but basically it remains a game that hides from you most of the dangers that are lurking around you and one of those dangers will get you at some moment in time.