You won’t be able to complete all quests in Gray Zone Warfare, as some will be locked after you complete another. Reclamation and Covert Research are perfect examples, as you have to choose between these two missions.
Recovery & Covert Investigation | Gray Zone Warfare GUIDE | Quick/Solo | Mission Tutorial
The Reclamation quest is given to you by Handshake, and he wants you to find cargo that is protected by a Fortified Hideout. With Covert Research, however, Lab Rat wants you to do the same, but he wants you to bring the cargo to her. You have to choose between the two in GZW, which means you can earn unique rewards from both vendors, and you may be inclined to favor one over the other.
Between these two, I chose Reclamation in GZW. I thought it was a better option to boost Handshake's reputation. But the choice is entirely up to you. Doing one quest over the other will not prevent you from working with a vendor or getting missions from them. However, some of the more advanced quests may take longer to unlock; you have to pass your main account level and unlock their stuff later. You don't have this problem with Helping Hand or Lost and Found.
It really comes down to the type of rewards you want from the vendor and what items sound more appealing to you. Here are all the rewards you get for completing Reclamation for Handshake in Gray Zone Warfare.
