NetHack

NetHack is one of the great survivors of computer gaming, a 1987 roguelike that has been challenging players for decades with randomly generated dungeons, brutal enemies, complex systems, and an almost supernatural ability to turn a promising adventure into a disaster. The player explores a dangerous dungeon, gathers equipment, fights monsters, solves problems, and attempts to survive long enough to achieve the ultimate goal. The catch is that death is permanent, the world is unpredictable, and the game contains enough obscure interactions to make experimentation both rewarding and occasionally catastrophic. You might discover a brilliant strategy, or you might eat the wrong thing and ruin everything. NetHack is famously deep, endlessly replayable, and wonderfully unforgiving. It is less a game you finish than a long-term relationship with failure, discovery, and increasingly elaborate stories about how your latest character died.