Simultaneous combat actions

[Tonguez]

DnD Combat is currently turnbased with everyone acting on initiative order to take and resolve their actions in a very methodical rational way

Simultaneous combat means everyone describes their actions and they are resolved simultaneously reflecting the chaos and uncertainty of combat

Anyway
Has anyone used simultaneous combat?

What are the Pros and Cons of using a Simultaneous vs Turn based combat system?
and how would you implement it in DnD?

 

[Quickleaf]

Have you tried Snap before? I think the website is
http://www.cse.msu.edu/~behrends/rpg/snap.pdf#search='snap%20d20'

Simultaneous combat is great fun. Only drawback is there is the possibility of acting to something that is no longer going on.

 

[interwyrm]

Here's an idea I've been toying with... a round is in two phases, move and action. Lowest initiative moves first, highest initiative acts first. Haven't tested it yet.

 

[tetsujin28]

Have I done it for D&D? No, it'd be a mess. But there are several games with semi-simultaneous systems (Runequest, the rumoured system for Exalted 2e), and those wil simultaneous systems (Burning Wheel, Riddle of Steel). And for those games, it works quite well.