Emergence Day just unleashed hell upon the people of Sera. A young Lieutenant named Damon Baird and his team, Kilo Squad, must square off against an indomitable locust villain to save a city and its people, and no rules or orders are going to stand in their way.
Download Horizon! (Click Image above.)
Go Diamond! (Click Image above.)
Diamond is $4.99 for 1 month (Recurring), $14.99 for 3 months, $44.99 for 1 year.
1. Start by moving your GearsCheckpoint from your HDD (Xbox 360) to a USB.
(How to move your Campaign Save to a USB from your HDD)
[details=Open Me]Reminder: I am using a Halo 4 Game Save as and example.
• From your dashboard go to System Settings, Storage, once done locate “Hard Drive”
• Scroll down till you find your Gears of War 3 Campaign Save
• Once you have selected your Save, locate and select “Move”
Example: Save
• It should give you the option to select another device, make sure to move the save to your USB, once done it should look something like this.
• Make sure your Save moved successfully to your device.
[/details]
2. Open your Device in the Device explorer in Horizon
Note: Make sure to format your device to work with your Xbox 360 and Horizon.
(How to format your device to work with your Xbox and Horizon)
[details=Open Me]• From your dashboard go to System Settings>Storage and locate your USB Storage Device.
• Once you have chosen your USB Storage Device, it should give you two options.
Option 1: Configure Now
Option 2: Customize
• Select Option 1 ( Configure Now )
Note: Make sure you have moved any Game Saves, Profiles back to your HDD before Configuring!
• Once you successfully configured your Device a message should pop up.
• Your device is now ready to be used with your Xbox 360 and Horizon!
[/details]
3. Once done open your “Game Folder” select your Game Save.
And select: 
Once you successfully opened the save, the editor should automatically open up.
Character Data
Characters
1. Here are the Characters that are currently with you on your mission. They mostly consist of Baird, Cole, Paduk, Sofia (Kilo Squad)
You can also edit the current character that you are playing as.
Example: I’m playing as Baird (Young), I can easily switch over to the epic reaper by selecting the scroll down tab, and choosing your character of choice.
Open Me
Reminder: Make sure to double check the current Check Point you are currently in: 
Weapons
2. The weapons option is very unique and can be very useful if done correctly basically, you can edit what starting Grenade, primary, and secondary weapons you have, as well as the amount of it by selecting the drop down tab, and choosing your weapon of choice.
Open Me
Note: You can max everything out by selecting: 
Score
3. Here you can edit the amount of individual score, and team score you have for that selected checkpoint.
4. You can also edit the amount of kills, deaths, revives you have for that selected checkpoint.
Select: 
to max out each stats!
Reminder: You can also edit the amount of health you have, the health option can be very useful when it comes to more difficult chosen mode as well as boss rounds.
Location
5. Location lets you choose where you spawn in the mission.
Note: Should not be messed with unless you know what you’re doing, you can easily spawn outside the mission and mess the mission up.
Example: X=-66, Y=53, Z=15.85, you can easily boost Campaign Commendations if you know the right Coordinates for that mission.
6. Once you modified your campaign to your pleasing, select the 
move your GearsCheckpoint back to your HDD in your Xbox360!
I hope you enjoyed this tutorial!
Horizon Support
This is the forum to post in if you have any issues.
Horizon Suggestions
This is the forum to post in if you have any suggestions for this editor or other editors you would like to see within Horizon.
But it says in the ‘Notice’ option.
Easy Peasy.