That's Dwarf Fortress Adventure Mode.
Where you kill things.
Fortress Mode is more of a "Make a fortress, infrastructure, manage dwarfs, murder invading goblins" thing.
Even the Adventure Mode is a bit more nuanced than most "KILL EVERYTHING THAT MOVES" games.
You die many, many times fighting.
Like Nethack.
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather