The term "roguelike" is used to describe a sub-genre of RPG featuring layer upon layer of randomized dungeons populated by all manner of beasts, traps and treasure. The name comes from the famed early videogame Rogue, an ASCII-based proto-RPG that has inspired and influenced a remarkable number of games in the decades since and that's famous for being perfectly happy to kill players who get out of line, or just get unlucky.