im not sure that you can?

At least in Practice Mode there is a chance to adjust the damage settings and such, maybe that will affect in other modes as well. I haven't had a need to turn it off but have you checked the Extras section entirely?

theres a kode for it in the krypt

I think it's only possible with a kombat kode and hence only when you're playing against another player and he inputs the same kode as you do. The kode is Raiden, MK, MK I believe.

Why do you want to turn it off anyway?

Thanks for the replies guys,
I get tired of both myself and the practice dummy turning all red when trying combos. Like I want people to identify the fighter and after a bit they're just soaked.

So the code is only during vs? That stinks.

I did not find any option in the practice menu that could modify damage or blood unfortunately :(

Are you certain of that? The in-game menu (with the move list and such).

I don't see it either, but I'd like to turn it off too. Blood and combat damage is cool and everything, but after about 5 minutes of combo practice they look like something out of a B horror movie.

mortal kombat isnt mortal kombat without the blood/gore and fatalities i can see if you have chilren but if now enjoy the violence

See that is just it. There are going to be times when someone else will walk in and it would be nice to have an on/off feature for the blood and damage. Don't get me wrong though, I like the gore in this game since it is mortal kombat. But after a few minutes in practice I can't tell the different between sektor and CSZ :)