1.The Cataclysm: Dark Days Ahead
Open source roguelike set in a post-apocalyptic and fictional New England. It's a continuation of Whale's original Cataclysm, which expands it with numerous new creatures, buildings, gameplay mechanics and many other features.
DiabloRL is a roguelike "unmake" of the popular Blizzard game Diablo. Originaly created for the 7 Day Roguelike Competition.
Brogue is a Roguelike game by Brian Walker. It is a direct descendant of Rogue, unlike other popular modern roguelikes, and it favors simplicity over complexity, while trying to ensure that the interactions between components will be interesting and varied.
4.Curse of War
Curse of War is a fast-paced action strategy game for Linux originally implemented using ncurses user interface. Unlike most RTS, you are not controlling units, but focus on high-level strategic planning: Building infrastructure, securing resources, and moving your armies.
Goblin Hack is a freeware roguelike (hack and slash RPG) opengl-based smooth-scrolling ASCII graphics game. Players can choose one of several classes before being thrown into the first floor of a randomised, ongoing dungeon.
There are no random events in XOR's labyrinthine palace, and there is no premium on hand-eye coordination. You have all the time in the world to work out the precise nature of the hazards you encounter. Logical thinking, strategy and tactical problem solving are part of the XOR experience.
A game of competitive puzzle-design. At its core, this is an abstract turn-based puzzle game in which you pick a lock by co-ordinating a pair of tools to manipulate its mechanism. The locks you pick are designed by other players; once you have figured out the secret of how to pick a lock, you must secure that secret behind a lock of your own devising.
Empire is a simulation of a full-scale war between two emperors, the computer and you. Naturally, there is only room for one, so the object of the game is to destroy the other. The computer plays by the same rules that you do. This game was ancestral to all later expand/explore/exploit/exterminate games, including Civilisation and Master of Orion.