Here's the deets on the missions..
Missing In Action
Get support from your mafia (6x). (Gift Requests)
Rob 8 Hotels in Las Vegas.
Loot 12 Hotel Security Key Cards from Job. (Swipe A Security Keycard)
One of Us
Collect from your Slots 3 times. (You may collect from Slots every 4 hours)
Fight 24 opponents in Las Vegas.
Job: Buy Some Black-Market Info (15x).
Get support from your mafia (12x). (Gift Requests)
Take out 10 Armed Guards. (Requires 10 Stamina)
Rob 15 times in Las Vegas.
Build 2 Vehicles.
Job: Blackmail A Car Dealer (10x).
Fight 26 opponents in Las Vegas.
Ice 4 opponents in Las Vegas.
Let the Pros Handle It
Win 20 fights in Las Vegas.
Take out 10 Heavily Armed Guards. (Requires 17 Stamina)
Win 1 War.