Requirements:
2 controllers, your main gold account, a silver or non xbox live account
Steps:
1. Sign into your main account on controller one
2. On your second controller (not signed in at the moment), click on system link
3. Click Ok to the error message
4. Go to any part of the multiplayer e.g barracks on xbox live
5. Sign in to the silver/non-xbox live account on controller two
6. You should now be in system link, well done. Throughout this topic depending on which glitch you choose n.o4 will be different.

Requirements:
2 controllers, modded mpdata (provided), Horizon, main gold account, silver/non xbox live account
Steps:
1. Download this: [ Register or Signin to view external links. ]
(Note: I made this myself, double right shield works but damage on the gun I put it on does not work online - even though the symbol sticks)
2. Download Horizon if you dont already have it
3. On your main account go to splitscreen and start a game and end it (If you are using USB please make sure to select it when asked to)
4. Open the mw3 mpdata in horizon (by plugging in your usb or hdd)
5. Go to contents (top right)
6. There should be one file
7. Right click > Replace > Locate the file you downloaded from me
8. Click Rehash and resign and this should save it to the device automatically.
9. Plug the usb/hdd back into your xbox
10. Load up MW3
11. On controller 1 sign in your main account if not already done so
12. On your main account (controller 1) go to splitscreen, click a once, select the device with the modded mpdata (press y if needed to)
13. Do not go into a lobby in splitscreen. Press b twice to take you back to the xbox live menu
14. On your second controller (not signed in) click system link
15. Click Ok to the error
16. On your main account (controller 1) click system link > disable competitive mode if need to > click barracks > click prestige shop > select something you want > hover over no
17. On controller 2 sign into a silver/non xbox live account
18. On your main account (controller 1) press b
19. On controller 2 select the device with the modded mpdata
20. Go to yes with main account (controller 1)
21. Click A - Well done you did it, repeat steps 11 - 21 to unlock something else

(main account needs to be lvl 55 or above) (this is pretty much the same as the token glitch but instead of going into the prestige shop go to prestige and the very last warning)
Requirements:
2 controllers, modded mpdata (provided), Horizon, main gold account (lvl55+), silver/non xbox live account
Steps:
1. Download this: [ Register or Signin to view external links. ]
(Note: I made this myself, double right shield works but damage on the gun I put it on does not work online - even though the symbol sticks)
2. Download Horizon if you dont already have it
3. On your main account go to splitscreen and start a game and end it (If you are using USB please make sure to select it when asked to)
4. Open the mw3 mpdata in horizon (by plugging in your usb or hdd)
5. Go to contents (top right)
6. There should be one file
7. Right click > Replace > Locate the file you downloaded from me
8. Click Rehash and resign and this should save it to the device automatically.
9. Plug the usb/hdd back into your xbox
10. Load up MW3
11. On controller 1 sign in your main account if not already done so
12. On your main account (controller 1) go to splitscreen, click a once, select the device with the modded mpdata (press y if needed to)
13. Do not go into a lobby in splitscreen. Press b twice to take you back to the xbox live menu
14. On your second controller (not signed in) click system link
15. Click ok to the error
16. On your main account (controller 1) click system link > disable competitive mode if need to > click barracks > click prestige mode > go to the very last warning (two symbols are shown) > hover over cancel
17. On controller 2 sign into a silver/non xbox live account
18. On your main account (controller 1) press b
19. On controller 2 select the device with the modded mpdata
20. Go to yes with main account (controller 1)
21. Click A - Well done you did it

(you can use the mpdata I have provided: [ Register or Signin to view external links. ] , but all you can really use is double riot shield) (if you want to make your own use this: [ Register or Signin to view external links. ] ) (please note that you must have the gun the right level for it to work online and stupid things like thermal on a pistol will not work)
Requirements:
2 controllers, modded mpdata (provided), Horizon, main gold account (lvl55+), silver/non xbox live account
Steps:
1. Download this: [ Register or Signin to view external links. ] or make your own mpdata
(Note: I made this myself, double right shield works but damage on the gun I put it on does not work online - even though the symbol sticks)
2. Download Horizon if you dont already have it
3. On your main account go to splitscreen and start a game and end it (If you are using USB please make sure to select it when asked to)
4. Open the mw3 mpdata in horizon (by plugging in your usb or hdd)
5. Go to contents (top right)
6. There should be one file
7. Right click > Replace > Locate the file you downloaded from me
8. Click Rehash and resign and this should save it to the device automatically.
9. Plug the usb/hdd back into your xbox
10. Load up MW3
11. On controller 1 sign in your main account if not already done so
12. On your main account (controller 1) go to splitscreen, click a once, select the device with the modded mpdata (press y if needed to)
13. Do not go into a lobby in splitscreen. Press b twice to take you back to the xbox live menu
14. On your second controller (not signed in) click system link
15. Click ok to the error
16. On your main account (controller 1) click system link > disable competitive mode if need to > click create a class > click copy > stay on this screen
17. On controller 2 sign into a silver/non xbox live account
18. On your main account (controller 1) press b
19. On controller 2 select the device with the modded mpdata
20. Pick a slot (controller 1)
21. Click A - Well done you did it, the class should now be copied over to online

(note 15 is the maximum no more than 15 will show up)
Steps:
1. Follow the prestige token glitch on this topic (n.o2)
2. On Step 16 instead of picking what ever you want choose an extra class
3. Repeat untill you have 15.

Requirements:
2 controllers, your main gold account, a silver/non xbox live account
Steps:
1. On your second controller (not signed in) click system link
2. Click ok to the error message
3. On your main account (controller 1) search for a game online (e.g domination)
4. Whilst searching sign into a silver/non xbl profile on controller 2
5. Quickly change competitive mode to enabled if needed to
6. Then click > create lobby
7. Then start game
8. It will load then kick you
9. You will have all titles and embelems temporary (if you sign out or turn off your console they will disappear)

Requirements:
2 controllers, your main gold account, a silver/non xbox live account, friends
Steps:
1. On your main account (controller 1) start searching for the gametype you want to have 18 people in.
2. Once you have started to search, back out and go to the xbox live menu, where it says splitscreen and system link.
3. On controller 2 (not signed in) click system link
4. Click ok to the error
5. Go to a private match on controller 1 (main account), then on controller 2 (not signed in), sign into your silver/non xbox live profile.
6. Now press b to back out of the system link lobby
7. You will be back in private match with a timer counting down. When the game loads end/leave it.
7. You should now be searching for the gametype you picked earlier but with 18 slots.
8. Start inviting your friends (atleast 1 or 2 to stop you joining/merging into another lobby)
9. When the minimum amount of people for the gametype you picked is met, the game will start.