For Advance Wars: Dual Strike on the DS, Guide and Walkthrough by ResidentEvilWeb.

For Dual Orb II on the Super Nintendo, Guide and Walkthrough by Datonare.

Dual Orb II - Guide and Walkthrough - Super Nintendo - GameFAQs

Dual Blades - Monster Hunter Freedom Unite Walkthrough & Guide - GameFAQs

For Star Wars: Knights of the Old Republic II - The Sith Lords on the Xbox, a GameFAQs message board topic titled "Single, Double or Dual?".

Single, Double or Dual? - Star Wars: Knights of the Old ... - GameFAQs

For Resident Evil 6 on the PlayStation 3, a GameFAQs message board topic titled "Dual-wielding".

A Titan Fighter's signature feature is being able to dual-wield (however poorly) two-handed weapons. However, for most of the game you will have similar damage output to regular Fighter dual-wielding, say, longswords because a regular Fighter gets Effortless Dual Wielding and can benefit from Gloves of Dueling.

The dual blades didn’t make an appearance in Monster Hunter Tri. People theorize this is because of Capcom having a tough time implementing motion controls for the Dual Blades, but this doesn’t make much sense as the Dual Blades are known for their button mashy nature and could’ve worked well with motion controls.

For Monster Hunter Stories 3: Twisted Reflection on the PC, a GameFAQs message board topic titled "What are some of the best Dual Elements for Monsties?".