One of the problems that plagues all editions of D&D is the lack of decent dual weilding rules. In fact dual weilding was initially considered so potentially powerful that it was deliberately made ineffective. I say no more of this, let's have some attempt at proper dual weilding in Dungons and Dragons! So with all that out of the way these are my simple little dual weilding rules.
"A good old one-two knock-out punch." When making an attack in melee a character may follow through with another attack at a -3 penalty. However this off-hand attack comes into play only if the first strike hits.
"Two halves of a single weapon. Don't think of them as separate, because they're not. They're just two different parts of the same whole." Any character with at least a 13 to Dexterity can attack with two weapons in one attack. When doing this the attacker makes two to-hit rolls and choses the lower of the two, inflicting damage equal to both weapons if he hits. He instead uses the average of the to attack rolls at Dexterity 16 and makes only one hit roll at a Dexterity of 18+. This is the default weapon style for the
hook sword.
