It's possible to be listed on your character sheet as Made Man for all four families at the same time, as outlined by Sébastien Caisse: "Once you've become a Made Man for a specific family, this family won't attack you any more. First you need to do all the possible quests for them, and not collect the final reward, and not assassinate Salvatore (until you're a Made Man for him). The trick is basically to sneak past everyone and collect your final reward by talking to the bosses before they engage in combat." Ryan P. Fialcowitz and Joshua Jansen then looked into the particulars and found there is another constraint: you must become Made Man for Bishop first, since Bishop's dialogue will change for the worse if you're already with some other family. This means that if you want all four you must end up allied with either the Wrights or the Mordinos. You will need to use a combination of Sneaking and running in combat mode to reach all bosses - saving a lot is recommended. Getting through the door to Salvatore is one of the tricky parts, but John Gaw points out: "If you talk to Mason while on good grounds, you can go into attack mode later and open the door with no problem whatsoever." Two more things should be noted. Firstly, despite what your character sheet says you will only be Made Man for one family at a time as far as the game is concerned, so there's no real reward for doing all this. Secondly, attacking the family you joined last will remove all Made Man labels from your list of reputations, but attacking any other family, including one you joined earlier, has no effect on them.