Feb 22, 2022 · To unlock Platinum Status in GTA Diamond Casino & Resort, you have to complete 5 Casino Work Missions for Head of Operations Agatha Baker. To unlock 5 Casino Work Missions call Ms. Baker after completing the first co-operative mission. You will earn some amazing rewards here. Lucky 7s Tattoo. Kronos Ara Watch: A store special accessory, unlock. Reserved for Platinum members, Diamond Rewards in GTA Diamond Casino & Resort will be available for those who go the long haul. Complete every co-op missions to earn exclusive liveries of a highly coveted brand-new vehicle. Unlock two cars including Annis S80RR Supercar. Diamond Pro awards will only be unlocked between August 8 to August 13, 2019.