If I hack games with Horizon, do I have to

Do I have to get individual programs from this site that are made specifically for Horizon to hack it, or does Horizon let you hack games just as it is? Because I’m looking to hack my last annoying Halo 3 achievements, and I saw something on this site about a Halo 3 GPD editor. (https://www.wemod.com/forum/43-xbox-360-modding-tools/54806-halo-3-gpd-editor.html). Would I have to download this to mod Halo 3?

Nope. Just use ur own profile and ur fine

Horizon is an All in One program. All game and profile tools are found within Horizon itself.

A list of all tools in Horizon can be found here: https://www.wemod.com/diamond/

All the other tools are made by community and not needed at all to mod anything spefic.

What if I wanted to mod a game that wasn’t on the list that Ash provided?

Depends what the game is. There is modder for almost every game avaialble.

There are other editors. Just take a look, there are also some gamesaves if u are looking for one.

You could easily find one that someone made or you could request one to be made here: Horizon Suggestions - XboxMB - Xbox Message Boards