H2V DevTrainer by Paulus in the making!

[Skyline]

I'm just saying that don't go and bring the man down. Instead, give suggestions...
And I bet that the options, if activated in multiplayer, will be on for EVERYONE

Do you know what your talking about? Single player maps are the same as multiplayer in a way but multiplayer can go online; they were compiled using the same tool, the same command. If you are not host the gravity hack will only work for you, this isn't halo pc's network here. If you change the gravity for SP it will be just for player 1, just like the speed hack, so it will work for multiplayer no matter what.