Things like dagger and sword were a real thing, but even that was done only because you did not have a shield available. Against multiple opponets, polearms were generally speaking better. Dual wielding may be better in some situations but its very niche and even those situations could be dealt with swords and shields.
Not sure if duel wielding would be better if you have 4 hands, or if it would be better to just have polearm. Or even shield, one handed weapon and polearm? But this game is not that kind of fantasy.