You will now have all the stealth gear and can start Mission 1: Safe House. When you complete all of Grims missions, new gear will be unlocked under the 'Customize Gear' option. Talk to Grim to get four side missions to complete before you start the main missions. You can also start side missions by talking to your team. Then, you will proceed to your plane to start the main missions. When you start the game, you will have to complete the prologue mission. Easy money, all weapons upgrades and gadgets at the start