NetHack

A turn‑based dungeon crawler set in a procedurally generated ASCII world, where the player explores levels, collects items, and combats monsters while managing hunger, health, and inventory. The game features permanent death, meaning a character’s progress is lost upon defeat, and a wide variety of interactions with objects, terrain, and NPCs that depend on the player’s choices and the random layout of each run. Its mechanics include a rich set of commands, a curses‑based interface, and support for both keyboard and mouse input.

The software is aimed at enthusiasts of classic roguelike games, developers interested in open‑source game code, and anyone who enjoys deep, strategic gameplay with high replayability. It runs on multiple operating systems via command‑line execution and provides pre‑built binaries for Windows, as well as source patches for modern compilers and libraries.

What distinguishes this title is its long history of community contributions, extensive documentation, and a reputation for challenging difficulty. The codebase is stable, with regular bug‑fix releases and security updates, and it remains a reference point for the roguelike genre and for research into procedural content generation.