The final mission is a real asshole, you do 68 missions together with Michael, Trevor and Franklin, and just as you get ready after the final hiest is passed, to cheer and be happy with your $28,000,000 cut, you have to make a horrible decision, when Devin Weston shows at Franklin's door and asks him to clip Michael, and previously the FIB asked him to clip Trevor.. so you have a three way choice. Kill Trevor, Kill Michael, or your Deathwish. There is a good and a bad thing for each.. except for Killing Michael, as killing him, you get the same cut, and you can't play as Michael anymore. Killing Trevor, however, you get his cut, making you get $43,000,000...but you lose Trevor. And finally, the Deathwish, is as I guessed, before I played it.. you kill a team of Maryweather and FIB, together, and then kill all the top dog members, Steve Haines, Devin Weston, Tai Cheng, and Stretch. End game, you all get your $28,000,000 cut and you get to play as all three still... win/win. (And yes, you rob the Union Depository of 4 tonnes in gold)