Kingdom Under Fire: Circle of Doom
HOW TO DUPE:
Requirements: Xbox 360, KUFCOD Game, Hard Drive, Another Person
This cannot be done alone so you will need someone to help you do it.
You cannot be the host! You need to let your friend host it.
WARNING: Pulling your hard drive while it is saving can damage your hard drive, xbox360, corrupt your game file, xbox live ban, etc. I take no responsibilities for any damages, bans, etc. If you chose to follow this tutorial then its your choice.
Step 1: Open trade with your friend and put the items you wish to dupe in the trade. Click Ok on the 1st screen then when you get to the confirm screen make sure your friend is confirmed and you are on the message saying "Continue with this trade"

Step 2: Get your hard drive ready for this. Make sure you press the little button and slightly pull your hard drive out where the button won't lock up. (HD Is really sensitive it will take a bit to get used to it)

Step 3: Now that you have the button unlocked and the "Continue with this trade" screen (Make sure its on the confirmed screen) you are ready to do this!
Make sure you tell your partner to confirm it and make sure he is the host.
Step 4: Now this can be timed really good, I got it to where it does it every single time. (PRESS A and at same time pull the HD out all the way)
Note: Your screen either will freeze or your xbox360 will restart. Either one just get back on.
Step 5: When you join your friends game, he will have the original item and you will have the dupe. Put your item into storage just to make sure it saves it.
There ya go! Now you can do this like me!!!

Enjoy!