GTA 5 Online High Priority Case Mission Guide GTA 5 Online High Priority Case High Priority case helicopter Mission Guide i have tried the High priority case mission on GTA 5 many times and these are the only ways i have seen it done. Working in a team made this much much easier.There are a few steps you can do to finish this missionbr GTA 5 Online High Priority Case Mission Guide "GTA5 High Priority Case Guide"br br Step 1 Get yourself a Helicopter or something that flies ( I have looked everywhere n the map and only able to find the one in the video ) now weather thats because i am above lvl 30 or not i dont know. everything in GTA is based around lvl hence the Titan at Lvl 32br br Step 2 A quire a sniper riflebr br Step 3 fly to the tall building next to the objective it has a heli pad on the roof.