I am trying to start them up but they dont work. :( Any help is appreciated:)
there are no halo cheats
You speak wrongly, my friend. For there are indeed cheats for Halo's singleplayer.
I just uploaded that, it's a single-player trainer. It lets you have invincibility, infinite ammo, superjump, possession of other characters, and time-freezing, to name a few. It works with all versions of Halo PC, and only in singleplayer. You won't be able to cheat in multiplayer with this.
yeah i know about that i was thinking more along the lines of putting cheats in ingame like typing something in then getting invincible or whatever
That doesn't work in Halo PC, that's only for Halo Custom Edition while you're running devmode. This trainer basically enables those same cheats to be used in regular Halo PC, except you don't need to enable devmode, and you don't need to use the console.