if i buy dead rising 2 \ off the record , it won't work ?

by march indeed i believe it will not work. unless its transferred to steamworks or you use a Crack

It's not for sure, but I seriously doubt it will be unplayable. At worst they'll remove GFWL and not add Steamworks, they can't just make your game no longer work, they'll either have to fix it or give you some sort of restitution. Time will tell on what will truly happen when GFWL is taken down.