Games/roguelike

Dungeon Crawl Stone Soup
Dungeon Crawl Stone Soup is a 1st class open-source roguelike game of exploration and treasure-hunting in dungeons filled with dangerous and unfriendly monsters in a quest to rescue the mystifyingly fabulous Orb of Zot. It features a wide variety of classes, items and spells and can be played offline and online. You can play the game in gui-mode (tiles useflag) or ascii-mode (ncurses useflag) or even in your browser.

YouTube demo