Please read this entire post before posting: it will cover things that you shouldn't bring up in this thread (because it's been discussed thousands of times before) and give you a general idea of what we're discussing here.
Now I know there is a lot of threads about dual wielding, but the majority of them have either a crappy OP, or bad user feedback for self-spawned reasons, often without reading other's posts.
Having a look at this thread: http://forums.spiralknights.com/en/node/48265 just displayed how people now would rather rage at the OP instead of read the thread. It also mentions that the Developers would not mind adding in Dual Wielding if it was PROPERLY THOUGHT OUT.
Nick also stated that if he were to implement dual wielding, it would be with a weapon set specially designed for it, and with a shield, albeit a limited one.
GOOD
These are ideas which could work
* An aesthetic change
Merely an animation which alters how the knight swings a sword/shoots a gun and makes it appear as if he has two, but does not alter the mechanics/damage/speed of the weapon at all.
* Dual-wielding Specific Weapons
Weapons that are custom made to be dual wielded, and balanced for this purpose. It could be two half-strength brandishes, or a vastly new weapon, such as the frequently suggested dagger.
Autofire brought up some examples here.
Fehzor had a different method of doing it here.
PLAUSABLE
These ideas have not been discussed thoroughly enough to determine whether or not they would be good or bad.
* A weakened defensive technique:
Anything but uni-directional blocking. Discuss this point, it hasn't been thought through enough.
BAD
These are ideas which would NOT work. You may discuss them but only if they're accompanied by a wall of text explaining why
* Any mechanism that removes the shield entirely, or makes it block only attacks from a certain direction.
Nick has already stated that you cannot fight in T3 without a shield. T1 is where players can fight without shields...but later tiers it just becomes too difficult.
* Being able to dual wield existing weapons, at least without SEVERE rebalancing issues.
This is a big one, and recurrs a lot in threads because people do not read the rest of the posts!'
* Dual wielding bombs
There isn't really a way to make this look even moderately sensible. A replacement for dual wielding bombs is multi-exploding bombs such as the Dark Reprisal series and the Shard Bombs.
Weak and overused arguments
Please do not use any of the following as a supporting statement for whatever you're going to say
* "You can't hold two weapons without dropping the shield"
The Nightblade shows that the shield is attached to the arm, rather than held in the hand. Overly large weapons such as Sadaruska and Triglav prove that our knight can hold vastly large and clumsy weapons without any adverse effects such as loss of balance.
* "Takes a lot of work for the Developers"
I'm not discussing the plausibility of the dual-wielding concept, but instead about how it would work if it were implemented. Time is irrelevant. If something is really wanted in a game, Developers will make time for it.
Topics Covered so far
So far we've gone over the problems of a unbalanced-appearing shield + 2 sword combination, and have come up with a possible smaller costume shield for this purpose. Also discussed the shield suffering health penalties.
Is there anything I have missed, or that you disagree with?
I don't think two half-strength weapons would work, except for cosmetic purposes. Why do two half hits when you can just do a whole hit? If dual wielding were to be implemented, there would have to be a reason or purpose to use it, of course with conditions. An example:
Pro: Dual wielded weapons deal 60 percent of what the weapon normally does but hit twice as much in the same time frame as a single weapon.
Con: Makes your blocking reduce damage by 50% as opposed to negate it all together. Your shield will still wear down and break like normal.
In this case, dual wielding gives you better offense, at the cost of defense. You can dual wield for more damage or single wield to retain your shielding advantage.
Also there is the issue of dual wielding bombs and Lockdown. Swords and guns would fit easily, but what would dual wield bombs do, and what effect would this have on Lockdown?